JP2003271508A - Contents conversion system for portable terminal and contents conversion method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem wherein when a Web page for a PC is displayed by a portable terminal, a screen for the PC can't be displayed correctly as it is by the portable terminal due to a small screen size of the portable terminal, operation of a cursor key, and a difference in markup language and image display format between the services. <P>SOLUTION: Information in HTML language downloaded from a Web site is converted to XHTMLBasic format by an HTML converting part 14, and the information converted into the XHTMLBasic format by a document generating part 15 is converted into contents for the portable terminal by a predetermined conversion rule description file, the image format and image size of the image data are converted for the portable terminal by an image conversion part 16, and further the contents are divided into parts of size corresponding to the screen of the portable terminal 21a by a page dividing part 18. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a content conversion system for mobile terminals such as mobile phones, and particularly for personal computers (also simply referred to as "PC").
The present invention relates to a content conversion system for mobile terminals and a content conversion method for converting content of an eb page into content for mobile terminals.

[0002]

2. Description of the Related Art Currently, three carriers of mobile phones provide access services to the Internet. However, displaying a website for PC on a mobile phone has the following problems.

[Situations peculiar to mobile phones] (1) When the screen display sizes of a mobile phone and a PC are small, the screen display size of the mobile phone can be displayed although there is some difference depending on the model. The overwhelmingly small amount of information. In FIG. 36, the carrier A (NT
I-mode (registered trademark) of T Docomo, carrier B (J
-Phone's J-SkyWeb (registered trademark), carrier C (K)
Indicates the maximum and initial number of characters that can be displayed on the screen for each model in DZ's EZWeb (registered trademark). Further, FIG. 37 is a diagram showing an example in which a screen for a PC is displayed on a mobile phone, and what it looks like when a screen with a relatively small amount of information shown in FIG. 37 (a) is displayed on the mobile phone, FIG. 37 (b) shows an example of a screen of a mobile phone of each company. FIG. 37
As shown in (b), in many cases, even if less information is seen on the screen of the PC, when viewed on the screen of the mobile phone, the entire contents are not displayed on one screen. You can see how small the screen display area of a mobile phone is.

(2) A mobile phone having a small amount of screen data has a W larger than the display area, like a PC.
By scrolling the eb page vertically or horizontally,
It is possible to display contents of screen size or larger. However, there is a limit to the amount of data that can be handled on one screen. FIG. 38 shows the amount of data that can be used on one screen of each company. Note that the values shown in FIG. 38 are sizes that include tags that are not displayed on the screen and image data in the page. Therefore, the character information that can be actually displayed is further reduced. In addition, general web pages, including images, often have a size of several tens of kilobytes to 100 kilobytes. When comparing web pages for mobile phones and web pages for PCs, markup languages and image formats are compared. However, the Web page for PC cannot be displayed as it is on the mobile phone. (3) Operation by Cursor Key The pointing device of a mobile phone is generally a cursor key, and the cursor cannot be immediately moved to desired information like a mouse of a PC. Therefore, in order to display the contents hidden under the screen, it is necessary to repeatedly press the key to the target position.

(4) Differences in markup languages HTML is usually used to create contents on a Web site for PCs. However, HTML is a markup language for a relatively large screen, so that it can be used in a mobile phone. Is not suitable. Therefore, each mobile phone carrier uses a markup language for the mobile phone. FIG. 39 shows an example of the markup language of each company. In this way, each company defines its own language specification, and it is not unified. Therefore, the page creator must create the page by using the markup language corresponding to each service, and Since the expression format is different for each service, the same screen cannot be expressed on all mobile phones. For example, the display method of radio buttons differs depending on the model.

(5) Tables are widely used in Web pages for PCs that are not suitable for displaying in table format. The original purpose of the table is to display tabular data, but many Web pages use the table for layout control (columns, etc.). But,
Markup languages for mobile phones do not offer a table replacement (due to its small screen size). Further, since the width is not large enough to be divided into columns, the screen is broken when a page created in a table for a list or layout is displayed on a mobile phone.

(6) Display of long drop-down list The drop-down list is frequently used as one of the input item selection methods, but if there are many choices, the following problems occur.・ Lower operability for users PC on mobile phones
Although it is possible to display a drop-down list as with, it takes time and effort to push the buttons as many as there are lists on the mobile phone.・ The drop-down list has a small amount of data.

(7) Differences in image format for each mobile phone In addition to the different image formats supported by mobile phones for each mobile phone carrier, the number of colors and sizes of the images that can be displayed by the same carrier, There are various differences such as size.
When providing images for mobile phones, it is necessary to identify the model of the accessed terminal and prepare an appropriate format for each model. FIG. 40 shows an example of a compatible image format of each service.

[Situations peculiar to PC pages] On the other hand, there are also peculiar circumstances to PC pages, which will be described below. (1) HTML language specifications HTML is a markup language specialized for PC content, and website providers create pages only on the assumption that the user uses a PC browser. Below, HTML not available on mobile phones
The function of is described. (A) Script language In HTML, it is possible to embed a script language for dynamic processing on the browser side used by the user. By using the script, it is as if the program is embedded in the page. It is possible to operate like this. However, these functions cannot be used because mobile phones do not support scripts. (B) Plugins Plugins are programs that allow browsers to have extended functions. Typical examples are "Acrobat".
(Registered trademark) ”. By installing the program in the PC in advance, it becomes possible to handle a special data format as an extended function of the browser. However, mobile phones are currently limited in the data formats that can be handled by browsers. (C) JVM (Java (registered trademark) Virtual Mac) possessed by the applet browser
hine) on the Java (registered trademark) program (Java
(Registered trademark applet) is downloaded and executed to realize a function equivalent to an application normally installed on a PC on a browser screen. Some mobile phones also have Java (registered trademark)
Corresponding models have appeared, but Java (registered trademark) for PC and Java (registered trademark) for mobile phones have different specifications. Therefore, Java (registered trademark) applets for PC can be directly carried. It cannot be operated by phone. In addition, there is a limit to the downloadable program size as well as the page size. For example, a certain model has a maximum size of 10 Kbytes per application. (D) This is a function to determine position information when an image displayed in the critical map browser is clicked with a mouse. It is used when you want to realize the function of enlarging and displaying the area by pointing to the position on the map. With a mobile phone, since the operation is performed using the cursor keys, such a function cannot be used. (E) Frame page This is a function of displaying a plurality of Web pages on the same screen. It is used when the content is always fixed like a menu and dynamically displayed according to the menu.
Mobile phones do not have a function like frame display due to the small size of the screen. (F) Character Modification The PC can perform character modification such as font type selection and character size specification, but mobile phones do not support this.

(2) Session management (cookie) Normally, it is not possible to identify a user by accessing a Web site by the HTTP protocol, but a Web for a PC that wants to identify an individual user who accesses the Web site.
At the site, the user who accesses can be identified by using the Cookie function. Cookie
This is a mechanism in which the website transmits the identifier to the browser of the PC, and the browser stores the identifier in the terminal so that the identifier is transmitted to the server the next time the same site is accessed. is there. However, the mobile phone does not have a mechanism for temporarily holding information from a website such as Cookie in the terminal.

(3) Security PC websites use a mechanism for transmitting data by an encryption method such as SSL (Secure Socket Layer) in order to prevent leakage of personal information. Mobile phones do not support such security features at the protocol level.

[0012]

The present invention has been made to solve such a problem, and its object is an obstacle when converting a Web page of an existing Web site for a mobile terminal. An object of the present invention is to provide a content conversion system and a content conversion method for mobile terminals, which can greatly solve various problems.

[0013]

The present invention has been made to solve the above problems, and a content conversion system for a mobile terminal according to the present invention is a method for converting a content of a Web page for a PC of an existing Web site into a mobile terminal. A content conversion system for a mobile terminal for converting and transmitting the content to a mobile terminal, which receives an HTTP request from the mobile terminal to an existing website, and a predetermined parameter including a model of the mobile terminal from the mobile terminal. The means for receiving the information and the HTML language information downloaded from the existing Web site are stored in XHTMLBasic.
HTML conversion means for converting to a format, and the XHTMLB
Document generating means for converting the information converted to the asic format into contents for a mobile terminal by a predetermined conversion rule description file, and an image format and an image size of the image data downloaded from the website for the mobile terminal. Image conversion means and page division means for dividing the content converted for the mobile terminal into a size corresponding to the screen of the mobile terminal. As a result, the Web page of the existing Web site can be displayed according to the model and screen size of the mobile terminal.

In the content conversion system for a mobile terminal of the present invention, the content conversion system manages session information between the mobile terminal and the existing Web site, and a form submission value from the mobile terminal. Form management means for temporary management in the system, and destination URL requested from the mobile terminal
And URL mapping means for performing a mapping process between the URLs of the existing website and the existing website. This allows you to maintain a session with your mobile device,
In addition, form input data can be sent to the website all at once, and the destination URL requested from the mobile phone
And the URL of the existing website can be easily corresponded.

Further, the content conversion system for mobile terminals of the present invention, in order to convert the content in the Web page for PC to the content for mobile terminal, description information in HTML format in the Web page for PC. To an XHTML format, and the XHTML
Format information using a stylesheet for XHTMLBas
ic format information conversion means and the XHTMLBa
It further comprises means for converting information in the sic format into content for a mobile terminal by a description file of a conversion rule defined by XSLT. As a result, the style sheet XSLT can be applied to process the data in the template format.

Further, the content conversion system for mobile terminals of the present invention confirms whether or not there is a drop-down list division tag in the content converted into the XHTML Basic format for page division by the page division means. , If there is a drop-down list division tag, a means for cutting out the part specified by the drop-down list division tag and adding a tag for identifying the next page, and a drop-down in the content converted to the XHTML Basic format Check whether there is a list other stage display tag, and if there is a dropdown list other stage display tag, cut out the part specified by the dropdown list other stage display tag and identify the tag that identifies the next page. In the content converted to XHTML Basic format It is checked whether or not there is a designated page division tag, and if there is a designated page division tag, a portion for cutting out the portion designated by the designated page division tag and adding a tag for identifying the next page, The size of the page divided by the means is compared with a preset reference size, and when the size exceeds the reference size, the excess portion is cut out and a tag for identifying the next page is further added. It is characterized by having. This allows
Even when using a drop-down list or the like, it is possible to divide the page according to the screen size of the mobile terminal and use the drop-down list according to the screen size of the mobile terminal.

The content conversion method for mobile terminals of the present invention is a content conversion method for mobile terminals for converting the content of a Web page for PC of an existing website to content for mobile terminals and transmitting the content. A procedure for receiving an HTTP request from the mobile terminal to the existing website and receiving predetermined parameter information including the model of the mobile terminal from the mobile terminal, and the HTM downloaded from the existing website
H to convert L language information to XHTML Basic format
TML conversion procedure, document generation procedure for converting the information converted to the XHTML Basic format into content for mobile terminals by a predetermined conversion rule description file, image format and image size of image data downloaded from the website And an image conversion procedure for converting the content for the mobile terminal, and a page division procedure for dividing the content converted for the mobile terminal into a size according to the screen of the mobile terminal. As a result, the Web page of the existing Web site can be displayed according to the model and screen size of the mobile terminal.

The content conversion method for a mobile terminal according to the present invention further comprises: a session management procedure for managing session information between the mobile terminal and the existing Web site by the content conversion system; and a form submit value from the mobile terminal. Form management procedure for temporary management in the system and destination URL requested from the mobile terminal
And a URL mapping procedure for performing a mapping process between the URLs of existing websites. This allows you to maintain a session with your mobile device,
In addition, form input data can be sent to the website all at once, and the destination URL requested from the mobile phone
And the URL of the existing website can be easily corresponded.

Further, the content conversion method for mobile terminals of the present invention, in order to convert the content in the Web page for PC into the content for mobile terminal, description information in HTML format in the Web page for PC is provided. To the XHTML format, and the above XHTML
Format information using a stylesheet for XHTMLBas
ic format information conversion procedure, and the XHTML
The procedure of converting the information in the asic format into the content for the mobile terminal by the description file of the conversion rule defined by XSLT is further performed. As a result, the style sheet XSLT can be applied to process the data in the template format.

In addition, the content conversion method for mobile terminals of the present invention, in order to divide a page by the page division procedure, confirms whether or not there is a drop-down list division tag in the content converted into the XHTML Basic format. , If there is a drop-down list split tag, cut out the part specified by the drop-down list split tag, add a tag that identifies the next page, and drop-down in the content converted to XHTML Basic format. Check whether there is a list other stage display tag, and if there is a dropdown list other stage display tag, cut out the part specified by the dropdown list other stage display tag and identify the tag that identifies the next page. In the procedure to add and the content converted to XHTML Basic format, Check whether there is a page division tag, and if there is a specified page division tag, cut out the portion specified by the specified page division tag and add a tag that identifies the next page, and the above-mentioned steps. The size of the page divided by is compared with the preset reference size, and if it exceeds the reference size, the excess part is cut out and a procedure for adding a tag for identifying the next page is further performed. It is characterized by being called. This allows
Even when using a drop-down list or the like, it is possible to divide the page according to the screen size of the mobile terminal and use the drop-down list according to the screen size of the mobile terminal.

Further, the computer-readable recording medium of the present invention is a computer in a content conversion system for mobile terminals for converting the content of a Web page for PC of an existing Web site into content for mobile terminals and transmitting the content. The procedure for receiving an HTTP request from the mobile terminal to the existing website and receiving the predetermined parameter information including the model of the mobile terminal from the mobile terminal, and the HTML language information downloaded from the existing website. An HTML conversion procedure for converting to the XHTML Basic format, and the XHTMLBa
A document generation procedure for converting the information converted into the sic format into content for a mobile terminal using a predetermined conversion rule description file, and converting the image format and image size of the image data downloaded from the website for the mobile terminal. It is a computer-readable recording medium in which a program for executing an image conversion procedure for performing the above and a page dividing procedure for dividing the content converted for the mobile terminal into a size according to the screen of the mobile terminal is executed.

Further, the computer program of the present invention causes a computer in a mobile terminal content conversion system for converting the content of a Web page for a PC of an existing Web site into content for a mobile terminal and transmitting the content to the mobile terminal. From existing websites to HTT
A procedure for receiving the P request and receiving predetermined parameter information including the model of the mobile terminal from the mobile terminal, and the H downloaded from the existing website.
An HTML conversion procedure for converting information in the TML language into the XHTML Basic format, a document generation procedure for converting the information converted into the XHTML Basic format into content for mobile terminals by a predetermined conversion rule description file, and from the website To execute an image conversion procedure for converting the image format and the image size of the downloaded image data for the mobile terminal and a page division procedure for dividing the content converted for the mobile terminal into a size according to the screen of the mobile terminal. It is a program of.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. Although a mobile phone is shown as an example of the mobile terminal here, it is of course applicable to other mobile terminals such as a PDA.

[Explanation of Problems and Solutions by the Content Conversion System of the Present Invention] FIG. 19 shows a list of problems and solutions to be solved by the contents conversion system of the present invention. Hereinafter, each problem and solution will be described in detail.

First, a method of solving the following problems will be described. (1) Mobile phone screen display size is small (2) Screen data capacity is small (3) Cursor key operation

As can be inferred from the size of the body of the mobile phone, the size of the page that can be displayed at one time and the amount of data that can be handled at one time are limited in the mobile phone. On the other hand, almost no Web page created for a PC is aware of the size of data. For example, P shown in FIG.
When the C web page is displayed as it is on the mobile phone,
As shown in FIG. As shown in FIG. 21, when a PC web page is automatically converted for a mobile phone,
Redundant explanations and inappropriate content are displayed.

Therefore, it is necessary to process the contents by the following method. (A) Deletion of Unnecessary Information As shown in FIG. 22A, information specific to the PC or information not particularly required to be displayed is deleted from the page, and only necessary information is narrowed down. In the example shown in FIG. 22A, browser version information and Java (registered trademark) Script are used.
The information on t is unnecessary and is deleted. (B) Moving the specific part within the page The specific information within the page is moved to another position. In the case of a PC, fixed information such as a list menu of contents is often displayed at the top of the page, but in the case of a mobile phone, on the contrary, fixed information such as a menu is always visible first. It's annoying, so it's often better to move to the bottom of the page. FIG. 22B shows an example in which the specific portion is moved within the page. (C) Moving a specific part to another page It is not necessary to always display on the page, such as precautions,
Content that should not be deleted is moved to another page and transitions with hyperlinks to reduce the amount of information on one screen. FIG. 22C shows an example in which the specific portion is moved to another page. (D) Addition / replacement of contents Allows addition / update of contents for mobile phones. FIG. 23
An example of additional writing / updating of contents is shown in (a). (E) Division of pages according to size If the contents cannot be changed, deleted, or moved like a read material, pages are automatically divided according to size. FIG. 23B shows an example of page division.

As described above, since HTML is a markup language with tags, the contents are blocked for each tag to combine these methods into a PC.
Web pages for mobile phones can be mechanically converted to mobile phones.

(4) Problem not suitable for display in table format For pages for PCs using a table, there are 2
There are different types of usage. (A) When layout is controlled (column) In the case of a page whose layout is shaped using a plurality of tables, each display area is often described as independent content. If the contents are not related to each other, it is possible to cut out the contents for each table, delete unnecessary ones, or change the display order. (B) When displaying a list of items As shown in FIG. 24, when a table is used to display a list of items, the same display cannot be made on a mobile phone, so the columns are expanded into rows. To do. Move unnecessary columns to another page. That is, two methods can be used. FIG. 25 is an example in which the table shown in FIG. 24 is converted for a mobile phone.

(5) Display of long drop-down list (A) Problem of user's operability deterioration (B) Problem of data amount of drop-down list Normally, a drop-down selection item is data that is not necessary until the user selects it. Therefore, it is possible to provide the list of items on another page. The data capacity of the page can be reduced by downloading the list to the item and displaying it as another page only when the user selects it. Specifically, a mechanism is provided in which a hyperlink is displayed instead of the drop-down list, and when the link is pressed, a transition to the item selection page is made. An example is shown in FIG.

(6) Difference in image format for each mobile phone In particular, in case of supporting a plurality of carriers, it is necessary to select an image suitable for each mobile phone and provide it to the mobile phone. Further, in order to provide a correct image, it is necessary to know which image format the mobile phone accessed on the website side supports. Every mobile phone has a mechanism for notifying the website of the access destination of its own model name (see FIG. 27). By using this, if the website knows which model corresponds to which image format, the image format can be specified using the correspondence table.
Using the information obtained here, a mechanism for selecting and distributing an appropriate image for each mobile phone can be realized by any of the following methods. (A) The link destination in the page is rewritten to match the image format with the mobile phone type of the access source. When the HTML is output, the URL of the image is dynamically changed to the URL of the image on the mobile phone that requested the image. In this method, it is necessary to prepare an image file according to the format of the corresponding mobile phone in advance. (B) Prepare a URL for image conversion that dynamically generates images according to the type of mobile phone that is the source of access, and when accessing it, automatically identify the type of mobile phone and output an appropriate image format To do.

(7) Session Management If the session is for a certain period (from the first access by the mobile phone to the end of a series of access), Co
Individual terminals can be identified by the following method instead of okie. When a Web page is output to a mobile phone, a unique session ID is embedded in every link in the page for each mobile phone accessed. An example is shown in FIG.
According to this method, when the mobile phone moves to the link destination, the server is notified of the session ID, so that each terminal can be identified. By repeating this,
A session between a mobile phone and a Web server can be maintained.

[Items that are not supported by the content conversion system of the present invention] The method of solving the problems in the content conversion system of the present invention has been described above. However, since there is no solution for the following problems, the content conversion system of the present invention is not provided. Then, processing is excluded.

(1) Difference in markup language for each carrier (A) Difference in radio button display method (B) Complex layout display problem These are due to the specifications of individual mobile phones, and the layout is as complicated as possible. Because there is no explicit solution except to avoid the combination of. When converting from an existing website, it is necessary to remove unnecessary tags from the table as much as possible and add supplementary information for mobile phones at the time of conversion.

(2) HTML language specifications (A) Script language Many script languages are provided for the convenience of the user, and browsers with the script function turned off or unsupported browsers (UNIX ( There are many websites that guarantee the operation even if there is no text browser (for registered trademark). Therefore, the content conversion system of the present invention does not support the script language. (B) Plug-in / Applet Since these programs are created on the assumption that they are used on a PC, they are not supported by the content conversion system of the present invention. (C) Clickable map mobile phones are not compatible with the content conversion system of the present invention due to the small screen size and the limitation of pointing devices. (D) Frame page It is difficult to configure the screen with a frame configuration on the screen of the mobile phone. The content conversion system of the present invention does not support it because it is considered that it is sufficient to display each frame. (E) Modification of Character Modification of a character is merely a matter of appearance and is not supported by the content conversion system of the present invention.

(3) If the website is for the management PC of the session, C
You can use cookie permanently until the browser expires, but the mobile phone does not have a mechanism like Cookie. In addition, since there is no function of notifying the website of the information that can identify an individual, the permanent session function cannot be practically used. Therefore, the content conversion system of the present invention does not support a persistent session function.

(4) Security Demand for security is high in various fields, but current mobile phones cannot support security such as SSL, except for some models. Therefore, the content conversion system of the present invention does not support it.

[Realization Method of Content Conversion System of the Present Invention] A realization method when the system is actually constructed will be described below. (1) Use of mobile application server Supports all carriers with single source and single URL access, has automatic session maintenance function with mobile phone,
A mobile application server capable of selecting an image file for each mobile phone model is commercially available, and the commercially available mobile application server is used as a component of the system in order to implement the method of the present invention.
In the implementation method below, when a mobile application server that can handle multiple carriers without being aware of the differences in markup languages by describing content in XHTMLBasic, which is a subset for HTML mobile phones, is used. Will be described as an example.

From the above points, it is only necessary to convert the HTML into the XHTML Basic format in the website for mobile phones, and it is not necessary to be aware of generating the content for each individual carrier. Also, session management can be performed in the same manner as a PC.

(2) Content conversion method As shown in FIG. 29, the content conversion method used in the present invention converts HTML output from an existing Web site into a conversion script language (see FIG. 29B) and a template. Is used to process (FIG. 29 (c)).
reference). That is, HTML is converted to XHTMLBa in preparation.
The data in the template format is processed by converting the data in the sic format and applying the XSLT, which is a style sheet, to the data in the XHTMLBasic format. For XSLT, a dedicated processor is also readily available. The functions of XSLT itself range from simple ones to complicated logic processing, and can flexibly deal with content conversion. When creating a style sheet, it is not efficient to prepare it for every Web page, so it is necessary to use a mechanism that allows it to be reused with a certain degree of versatility. The method using this style sheet is used for the URL that matches the conditions.

(3) Access method from mobile phone When the content conversion is performed by the relay server method, the request (URL) from the mobile phone is mapped to the URL of the existing system by some method in the website for mobile phones. is necessary. Usually, HTML of various service screens provided on a website is stored in a directory hierarchy. For example, "WWW.nttcom.c
Various services provided by the "o.jp" server are stored in the disk in a directory structure as shown in FIG. To specify a normal URL, a file name is specified after the server name in the same hierarchy as the directory structure. Here, there are the following three methods for specifying the URL from the mobile phone to access the existing website. (A) Method of accessing with the same directory structure as the existing website Access is made with the same directory structure as the existing website. For example, to access converted English news for mobile phones, do the following. `` Http://WWW.keitai.co.jp/english/news/index.htm
l ”This specification method is the same as for existing websites, so it is easy for users to understand, and because the website for mobile phones does not require any processing for the URL, maintenance by the administrator is also required. It's easy. However, when the conversion source accessed by the mobile phone website extends over a plurality of existing websites, there may be duplicate directories and files between the servers. (B) Method of designating and accessing URL of existing website with parameters This is a scheme of designating and accessing all URLs of existing websites to be converted as parameters to the URL of website for mobile phones. For example, specify as follows. `` Http://WWW.keitai.com/?url=http://www.nttcom.co.
"jp / english / news / index.html" With this designation method, the URL of the existing Web site that provides the service is input as it is, so the administrator can easily perform maintenance. However, U
The RL tends to be too redundant. (C) Method of Accessing Based on Correspondence Table This is a method of managing the correspondence between the URL of the existing website and the URL of the mobile phone website in a table, and designating the URL of the existing website based on the correspondence table. Figure 31
An example is shown in. Based on this correspondence table, for example, input as follows. "Http://WWW.keitai.com/enews.html"

In the present invention, the following three methods are combined to perform the following URL mapping. -To simplify management, the URL can be specified with the same directory structure as the existing website. -Assuming a service using a plurality of websites, in addition to the directory hierarchy designation, the server name of the existing site is also designated.・ UR of the existing site so that the input in the URL is short
Prepare a correspondence table of L and abbreviations. Alternatively, the Web server side is set so that the URL becomes shorter.・ Provide restrictions so that you cannot access anything other than a specific URL.

(4) Session Management Method (A) Session Linking A mobile phone = a session between existing sites is realized by linking each session with a website for mobile phones. The mobile application server is used for the session between the mobile phone and the mobile phone website, and the session between the existing site and the mobile phone website is transmitted from the existing site Cookie.
It is realized by holding in the server for each mobile phone. An example is shown in FIG. In the content conversion system of the present invention, when the session between the existing mobile phone and the website expires, the session (C
cookie) is also deleted. (B) Temporary storage mechanism of form data Form data (parameter value) is data for transmitting the information input by the user to the input item to the server side. When you click the send button, the entered value is
Sent to the server as shown in. Normally, all the contents of the form have to be sent to the server side at a time, so when displaying a long input form on a mobile phone, it is necessary to input all input items on one screen.
When relaying between a mobile phone and an existing web site on a mobile phone website, the input form can be freely divided by having a mechanism that temporarily stores the contents entered in the form in the server, and the input form is entered individually. The stored information is temporarily stored, and finally sent collectively to the existing website. The content conversion system of the present invention uses this mechanism for dividing the drop-down list. The following shows an example of temporary storage of form data. (A) Example of redundant form In the example of the redundant form shown in FIG. 34, normally all the contents of the form must be sent to the server side in a lump, so all input items must be input to the end and It is necessary to press the send button. (B) Example of Utilization of Temporary Saving Mechanism of Form Data As shown in FIG. 35, the contents of the form are divided into a plurality of pages, and the data updated on each page are collectively sent to the existing website. This implements a function of dividing items that do not need to be normal into another screen and displaying the drop-down list on another screen.

[0044]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram showing an example of the configuration of a content conversion system according to the present invention. 1 is the entire content conversion system, 11 is a mobile phone interface section, 12 is a session management section, 13 is a request processing section, 14 is HTML
A conversion unit, 15 is a document generation unit, 16 is an image conversion unit, 17 is a form management unit, 18 is a page division unit, and 19 is a page division unit.
Is a URL mapping unit, 21a is a communication service A (i-mode (registered trademark)) mobile phone, 21b is a communication service B (J-SkyWeb (registered trademark)) mobile phone, and 21c is a communication service C (EZWeb (registered trademark)). Trademark)) mobile phone, 31 indicates an existing website. Note that the mobile phones are collectively referred to as the mobile phone 21. Further, although the mobile phone 21 is illustrated as the mobile terminal in this example, the present invention is also applied to other mobile terminals such as a PDA.

In FIG. 1, each unit has the following functions. The mobile phone interface unit 11 receives an access request from the mobile phone 21 to the website 31. Called from a mobile phone through the mobile application server. After acquiring the terminal information of the mobile phone 21, the contents management unit is requested to perform the processing. The session management unit 12 manages the information held during the session among the mobile phone 21, the content conversion system 1, and the existing website 31. The request processing unit 13 uses the HTTP protocol to issue a request to the website,
Download L. The HTML conversion unit 14 performs XHTML conversion and XHT conversion.
MLBasic conversion is performed, and HT is used for XHTML conversion.
Convert ML format data to XHTML and DOM on memory
It is retained as (Document Object Model) tree. XH
In the TMLBasic conversion, XHTML is converted into the XHTMLBasic format using a style sheet. The document generation unit 15 converts the data in XHTML Basic format according to XSLT. Format as content for mobile phones. The image conversion unit 16 downloads an image file from the existing website 31, converts the image format and the image size for the mobile phone, and saves the file. The form management unit 17 temporarily manages the form submission value from the mobile phone in the system.

The page division unit 18 divides the content to be output to the mobile phone into pages as needed. This page division divides the data converted into the XHTML Basic format into a plurality of pages. At this time, the DOM tree is processed and divided into pages (see FIG. 11). In addition, the procedure is roughly as follows. Inserting a tag for page division Page division by the drop-down list page option group (tag for dividing the drop-down list into other stages) Page division by the specified size

As a result of these processes, XHTMLBasic
The elements removed from FIG. 13 are shown in FIG. In addition, FIG. 14 shows the elements added to the XHTML Basic as a result of the processing. 15 shows an example of inserting a tag for page division, FIG. 16 shows an example of moving the drop-down list to another page, and FIGS. 17 and 18 show moving of the option group to another page by the DOM tree. An example of processing is shown.

The URL mapping unit 19 includes the destination URL requested from the mobile phone and the existing Web site 31.
Mapping processing is performed between the URLs.

FIG. 2 is a flow chart showing the flow of overall processing in the content conversion system.
The flow of processing will be described below based on the flowchart of FIG. (1) The mobile phone interface unit 11 receives a request from the mobile phone 21 (step S10).
1). After the terminal information of the mobile phone 21 is acquired, the model name of the mobile phone 21 and other parameters are analyzed, and the content management unit is requested to perform processing. (2) The session management unit checks whether or not it is the first request for the requested page (step S102). If it is not the first request, the content for the mobile phone is already stored in the cache, so the content is acquired from the cache (step S121). It should be noted that it is confirmed whether or not the request from the mobile phone 21 has a form submission value, and if there is a submission value, the form is updated (steps S122 and S123). (3) In the case of the first request, the request processing unit 13 makes an HTTP request to the existing website 31 (step S103). (4) The HTML conversion unit normalizes the HTML (step S104). The HTML format data is converted to the XHTML Basic format so that it can be output to the mobile phone. (5) The document generation unit 15 converts the content for the mobile phone (step S105). XHTM
The data in the LBasic format is converted according to XSLT (conversion rule description file), and is formatted as content for providing a service for mobile phones. (6) The image conversion unit 16 acquires image data (step S106). The image file is downloaded from the existing website 31, the image format and the image size are converted for the mobile phone, and the file is saved. (7) The form management unit 17 temporarily manages the form submission value from the mobile phone in the system (step S107). (8) The page dividing unit 18 divides the page (step S108). The content output to the mobile phone is divided into pages as needed. (9) The session management unit 12 saves content for mobile phones in the cache (step S10).
9). (10) The session management unit 12 extracts a display page (step S110). (11) The URL mapping unit 19 performs a mapping process between the destination URL requested from the mobile phone and the existing website 31 (step S111). (12) The mobile phone interface unit 11 outputs content data for the mobile phone 21 (step S112).

FIG. 3 is a flow chart showing the detailed flow of the HTML normalization processing. The operation will be described below based on the flowchart of FIG. (1) First, it is checked whether or not the end tag (the part "</ ...") is omitted (step S201). (2) If the end tag is omitted, add an end tag to the omitted element (step S202). (3) Convert all element names and attribute names to lower case (step S203). (4) Enclose the attribute value in quotation marks (step S204). (5) Check whether the attribute value is omitted (step S205). (6) If the attribute value is omitted, the attribute value is added (step S206). (7) Enclose the contents of the element enclosed by <script><style> in a CDATA section (step S207). (8) Delete tags / attributes that are not in the contents of XHTMLBasic (step S208).

FIG. 4 is a flow chart showing a detailed flow of processing for converting contents for a mobile phone. The operation will be described below with reference to the flowchart of FIG. (1) Obtain the conversion rule description file name (step S301). (2) Conversion is performed according to the conversion rule description file (step S302).

FIG. 5 is a flow chart showing the detailed flow of the processing for acquiring image data. Below, FIG.
The operation will be described with reference to the flowchart of FIG. (1) Download an image file from the existing website 31 (step S401). (2) The size of the image (image size) is acquired (step S402). (3) The acquired image size is compared with the display size of the mobile phone (step S403). (4) In the case of "image size> display size of mobile phone", the image size is reduced (step S404). (5) Convert the image format into a format that can be displayed on a mobile phone (step S405).

FIG. 6 is a flow chart showing the detailed flow of page division processing. The operation will be described below with reference to the flowchart of FIG. (1) A tag for identifying the entire page as the first page is added (step S501). (2) It is checked whether there is a drop-down list division tag (step S502). (3) If there is a drop-down list division tag, the portion specified by the drop-down list division tag is cut out and a tag for identifying the next page is added (step S5).
03). (4) It is checked whether or not there is a drop-down list other stage display tag (step S504). (5) If there is a drop-down list other-stage display tag, the portion specified by the drop-down list other-stage display tag is cut out and a tag for identifying the next page is added (step S505). (6) It is checked whether there is a designated page division tag (step S506). (7) If there is a designated page division floor display tag, the portion designated by the designated page division tag is cut out and a tag for identifying the next page is added (step S507). (8) The size specified in the division setting file is compared with the size of each page divided up to the above (step S508). (9) If the size of the divided pages is larger,
The portion exceeding the size specified in the division setting file is cut out and a tag for identifying the next page is added (step S509).

FIG. 7 is a diagram showing a screen example of a Web page of an existing Web site, which is converted by the content conversion system of the present invention. FIG. 8 is a diagram showing an example in which the screen shown in FIG. 7 is converted for a mobile phone, and is an example of a display screen for communication service A (i-mode (registered trademark)). As shown in FIG. 8, first, a page summarizing items with large headings is created, and each item in the table is moved to another page. 9 and 10 are diagrams showing a description example of a style sheet used for screen conversion, which is used when the screen of the Web page shown in FIG. 7 is converted to the screen for mobile phones shown in FIG. This is an example of a style sheet to be used.

Although the embodiment of the present invention has been described above, the content conversion system for a mobile terminal of the present invention is not limited to the above-described illustrated example, and does not depart from the scope of the present invention. Of course, various changes can be made.

Further, a program for realizing the function of each processing unit shown in FIG. 1 is recorded in a computer-readable recording medium, and the program recorded in this recording medium is read into a computer system and executed. The processing of the content conversion system may be performed according to. The “computer system” mentioned here includes an OS and hardware such as peripheral devices. Also,
The “computer system” includes a homepage providing environment (or display environment) when using a WWW system. The "computer-readable recording medium" means a flexible disk,
General media such as magneto-optical disk, ROM, CD-ROM,
A storage device such as a hard disk built in a computer system. Further, the "computer-readable recording medium" means to hold a program dynamically for a short time like a communication line when transmitting the program through a network such as the Internet or a communication line such as a telephone line. Those (transmission medium or transmission wave), and those that hold the program for a certain period of time, such as volatile memory inside the computer system that serves as a server or client in that case, are also included. Further, the above program may be a program for realizing a part of the above-mentioned functions, and a program that can realize the above-mentioned functions in combination with a program already recorded in a computer system, that is, a so-called difference file (difference file). program)
May be

[0057]

As described above, in the content conversion system and the content conversion method of the present invention, W
Converts the HTML language information downloaded from the eb site into the XHTML Basic format,
The information converted into ic format is converted into content for mobile terminals by a predetermined conversion rule description file,
Further, the image format and the image size of the image data downloaded from the website are converted for the mobile terminal, and the converted content is further divided into sizes according to the screen of the mobile terminal.
The web page of the site can be displayed according to the model and screen size of the mobile terminal.

Further, in the content conversion system and the content conversion method of the present invention, the session information between the mobile terminal and the website is managed, and the form submit value from the mobile terminal is temporarily managed in the system, Furthermore, the destination URL requested from the mobile terminal and the existing W
Since the mapping process between the URLs of the eb site is performed, the session with the mobile terminal can be maintained, the form input data can be collectively transmitted to the website, and the destination U requested from the mobile phone can be transmitted.
Correspondence between the RL and the URL of the existing website can be easily performed.

Further, in the content conversion system and the content conversion method of the present invention, in order to convert the content in the Web page for the PC into the content for the mobile terminal, the description information in the HTML format in the Web page for the PC is written. Is converted to XHTML format, and the information in XHTML format is converted to XHTMLBasi using a style sheet.
Since the information in the c format is converted into the content for the mobile terminal by the description file of the conversion rule defined in XSLT, the information in the XHTML Basic format is converted into the style sheet XSLT.
Can be applied to process data in template format.

Further, in the contents conversion system and contents conversion method of the present invention, XHTML Basi is used.
Drop-down list split tag, drop-down list other stage display tag in the content converted to c format,
And check whether there is a specified page division tag, if there are, cut out the part specified by the tag,
A tag for identifying the next page is added, and the size of the divided pages is compared with a preset reference size.
When the size exceeds the standard size, the excess part is cut out and the next page is identified, so that even when using a drop-down list, etc.
The page can be divided according to the screen size of the mobile terminal, and the drop-down list according to the screen size of the mobile terminal can be used.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration example of a content conversion system of the present invention.

FIG. 2 is a flowchart showing an overall processing flow in the content conversion system.

FIG. 3 is a flowchart showing a detailed flow of HTML normalization processing.

FIG. 4 is a flowchart showing a detailed flow of a process of converting content for a mobile phone.

FIG. 5 is a flowchart showing a detailed flow of a process of acquiring image data.

FIG. 6 is a flowchart showing a detailed flow of page division processing.

FIG. 7 is a diagram showing a screen example of a web page of an existing website.

FIG. 8 is a diagram showing an example in which the screen shown in FIG. 7 is converted for a mobile phone.

FIG. 9 is a first diagram illustrating a description example of a style sheet.

FIG. 10 is a second diagram showing a description example of a style sheet.

FIG. 11 is a diagram for explaining page division processing.

FIG. 12 is a diagram showing input / output information in division processing.

FIG. 13 is a diagram showing an example of elements deleted from XHTMLBasic as a result of division processing.

FIG. 14 is a diagram showing an example of elements added to XHTMLBasic as a result of division processing.

FIG. 15 is a diagram showing an example of inserting a page division tag.

FIG. 16 is a diagram showing a DOM tree for moving a drop-down list to another page.

FIG. 17 is a diagram showing a DOM tree before processing for moving an option group to another page.

FIG. 18 is a diagram showing a DOM tree after processing for moving an option group to another page.

FIG. 19 is a diagram showing a list of problems to be solved and solutions.

FIG. 20 is a diagram showing an example of a PC screen.

FIG. 21 is a diagram showing an example in which the Web page for PC shown in FIG. 20 is directly converted for a mobile phone.

FIG. 22 is a first diagram for explaining the processing of the content details.

FIG. 23 is a second diagram for explaining the processing of the content details.

FIG. 24 is a diagram showing an example of displaying a list of items using a table.

FIG. 25 is a diagram showing an example of conversion of the table shown in FIG. 24 for mobile phones.

FIG. 26 is a diagram showing a display example of a drop-down list.

FIG. 27 is a diagram showing notification of a model name.

FIG. 28 is a diagram for explaining session management.

FIG. 29 is a diagram for explaining a content conversion method.

FIG. 30 is a diagram for explaining an access method from a mobile phone.

FIG. 31 is a diagram for explaining a method of accessing based on a correspondence table.

FIG. 32 is a diagram for explaining a session management system.

FIG. 33 is a diagram for explaining transmission of form data.

FIG. 34 is a diagram showing an example of a redundant form.

[Fig. 35] Fig. 35 is a diagram illustrating an example of using the temporary storage mechanism of form data.

FIG. 36 is a diagram showing the number of characters displayed on the screen of each company's mobile phone.

FIG. 37 is a diagram showing an example of a PC screen and a screen of a mobile phone.

FIG. 38 is a diagram showing an example of the screen data capacity of a mobile phone.

FIG. 39 is a diagram showing an example of a markup language of each service.

[Fig. 40] Fig. 40 is a diagram illustrating an example of a compatible image format of each service.

[Explanation of symbols]

1 Content conversion system 11 Mobile phone interface section 12 Session Management Department 13 Request processing unit 14 HTML converter 15 Document generator 16 Image converter 17 Form Management Department 18 page division 19 URL mapping section 21a, 21b, 21c mobile phones 31 Existing website

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Fumiki Shirakawa             1-9-1, Konan, Minato-ku, Tokyo             IT Comware Co., Ltd. F term (reference) 5B069 AA01 BA04 BB16 CA06 LA05

Claims (10)

[Claims] 1. A content conversion system for a mobile terminal for converting a content of a web page for a PC of an existing website into a content for a mobile terminal, and an HTTP from the mobile terminal to the existing website. A means for receiving a request, receiving predetermined parameter information including the model of the mobile terminal from the mobile terminal, and an HTML for converting the HTML language information downloaded from the existing website into the XHTML Basic format.
L conversion means, document generation means for converting the information converted into the XHTML Basic format into content for mobile terminals by a predetermined conversion rule description file, image format and image size of image data downloaded from the website A content conversion system for a mobile terminal, comprising: an image conversion means for converting the content for the mobile terminal; and a page division means for dividing the content converted for the mobile terminal into a size corresponding to a screen of the mobile terminal. . 2. A content management system for managing session information between the mobile terminal and the existing website, and a form for temporarily managing a form submit value from the mobile terminal in the system. The content conversion system for a mobile terminal according to claim 1, further comprising: management means and URL mapping means for performing a mapping process between a destination URL requested from the mobile terminal and a URL of an existing website. 3. A means for converting the description information in HTML format in the Web page for PC into XHTML format in order to convert the content in the Web page for PC to content for mobile terminal, X information in XHTML format can be
The method according to claim 1, further comprising means for converting the information in HTMLBasic format, and means for converting the information in XHTMLBasic format into content for a mobile terminal by a description file of a conversion rule defined by XSLT. The content conversion system for mobile terminals according to claim 2. 4. In order to divide the page by the page dividing means, it is confirmed whether or not there is a dropdown list division tag in the content converted to the XHTMLBasic format, and if there is a dropdown list division tag, , Means for cutting out the portion specified by the drop-down list division tag and adding a tag for identifying the next page, and checking whether or not there is a drop-down list other stage display tag in the content converted to the XHTML Basic format. If there is a drop-down list other-stage display tag, the part specified by the drop-down list other-stage display tag is cut out and a tag for identifying the next page is added, and converted to the XHTMLBasic format. Check whether the specified page division tag is included in the content, and specify the specified page. If there is a page division tag, the section specified by the specified page division tag is cut out and a tag for identifying the next page is added, the size of the page divided by each of the above sections, and a preset value. 4. The method according to claim 1, further comprising means for comparing with a reference size, and when exceeding the reference size, cutting out an excess portion and adding a tag for identifying a next page. The content conversion system for mobile terminals according to Crab. 5. A content conversion method for a mobile terminal for converting a content of a web page for a PC of an existing website into a content for a mobile terminal, which is HTTP from the mobile terminal to the existing website. A procedure for receiving a request and receiving predetermined parameter information including the model of the mobile terminal from the mobile terminal, and an HTML for converting the HTML language information downloaded from the existing website into the XHTML Basic format.
L conversion procedure, document generation procedure for converting the information converted into the XHTML Basic format into content for mobile terminals by a predetermined conversion rule description file, image format and image size of image data downloaded from the website And a page division procedure for dividing the content converted for the mobile terminal into a size according to the screen of the mobile terminal, the content conversion method for the mobile terminal. 6. A session management procedure for managing session information between the mobile terminal and the existing website by the content conversion system, and a form for temporarily managing a form submit value from the mobile terminal in the system. The content conversion method for a mobile terminal according to claim 5, further comprising a management procedure and a URL mapping procedure for performing a mapping process between a destination URL requested from the mobile terminal and a URL of an existing website. 7. A procedure for converting the description information in HTML format in the Web page for PC into XHTML format in order to convert the content in the Web page for PC into content for mobile terminal, X information in XHTML format can be
The procedure of converting the information in HTMLBasic format, and the procedure of converting the information in XHTMLBasic format into content for a mobile terminal by a description file of a conversion rule defined in XSLT, are further performed. The content conversion method for mobile terminals according to claim 6. 8. In order to divide a page according to the page division procedure, it is confirmed whether or not there is a dropdown list division tag in the content converted to the XHTMLBasic format, and if there is a dropdown list division tag, , The procedure of cutting out the part specified by the drop-down list division tag and adding a tag for identifying the next page, and checking whether the drop-down list other stage display tag is included in the content converted to the XHTML Basic format. Check, if there is a drop-down list other-stage display tag, cut out the part specified by the drop-down list other-stage display tag, add a tag for identifying the next page, and convert to the XHTML Basic format. Check whether the specified page division tag is included in the content, and specify the specified page. If there is a page division tag, cut out the portion specified by the specified page division tag and add a tag that identifies the next page, the size of the page divided by each of the above steps, and the preset 8. The procedure of comparing with a reference size, and when exceeding the reference size, a procedure of cutting out the excess portion and adding a tag for identifying the next page is further performed. The content conversion method for mobile terminals according to Crab. 9. A computer in a content conversion system for a mobile terminal for converting the content of a web page for a PC of an existing website into a content for a mobile terminal, and transmitting the content from the mobile terminal to the existing website. A procedure for receiving an HTTP request and receiving predetermined parameter information including the model of the mobile terminal from the mobile terminal, and an HTML for converting the information in the HTML language downloaded from the existing website into the XHTMLBasic format.
L conversion procedure, document generation procedure for converting the information converted into the XHTML Basic format into content for mobile terminals by a predetermined conversion rule description file, image format and image size of image data downloaded from the website A computer-readable record that records a program for executing an image conversion procedure for converting a mobile terminal for a mobile terminal and a page division procedure for dividing the content converted for the mobile terminal into a size according to a screen of the mobile terminal. Medium. 10. A web for a PC of an existing web site
The computer in the content conversion system for mobile terminals for converting the content of the page into the content for mobile terminals and transmitting the HTTP request from the mobile terminal to the existing website and the mobile terminal from the mobile terminal. And a procedure for receiving predetermined parameter information including the model, and an HTML format for converting the HTML language information downloaded from the existing website into the XHTML Basic format.
L conversion procedure, document generation procedure for converting the information converted into the XHTML Basic format into content for mobile terminals by a predetermined conversion rule description file, image format and image size of image data downloaded from the website A program for executing an image conversion procedure for converting a content for a mobile terminal and a page division procedure for dividing the content converted for the mobile terminal into a size according to the screen of the mobile terminal.