KR20020036447A - Web-page converter and method for mobile web clients using semantic database - Google Patents

Abstract

PURPOSE: A device and a method for converting a user web page using a semantic database are provided to convert the web pages provided from a web server to fit to a characteristic of a portable information device by using the semantic database and placing a medium between the portable information device and the web server. CONSTITUTION: The device comprises an HTML(HyperText Markup Language) analyzer(31), the semantic database(32), a middle format converter(33), a filter(34) and a rewriting device(35). The HTML analyzer analyzes an electronic document format of the web page by accepting the HTML document from the web server. The semantic database stores whether a part of the web document is important or not, and the specification of the portable information device. The middle format converter converts the web document based on the document format analysis information. The filter filters a part of contents of the web document converted into the expression method of the middle format in consideration of the weight information stored in the semantic database and the specification. The re-writing device rewrites the web document passing the filter and provides the rewritten web document to a portable HTTP client.

Description

Device and method for converting user web pages using semantic database {WEB-PAGE CONVERTER AND METHOD FOR MOBILE WEB CLIENTS USING SEMANTIC DATABASE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for converting a web page to meet characteristics of a portable information device when accessing web documents through a portable information device. The present invention relates to a desktop PC based web using a semantic database. The present invention relates to a web page converting apparatus and method using a semantic database that converts documents to fit a specific portable information device so that the quality of the documents is increased.

With the development of wireless communication technology and the rapid spread of the Internet, the amount of use of Internet services using portable information devices is increasing rapidly. In particular, new services that provide access to WWW (World Wide Web) documents, which are representative of Internet services, are available through various wireless telecommunications companies. Accessibility was being discussed.

However, most web documents accessed through portable information devices are designed for desktop PCs that have different system specifications (eg, higher resolution displays, multimedia support) than portable information devices. Portable information devices with screens, low computing power and low memory space have limitations in accessing existing web documents.

In other words, multimedia data provided by existing web documents or image information requiring a high resolution display make access to a web document occurring in a portable information device difficult. As a result, the level of web document access services through a portable information device is very rudimentary at the present time when this problem is not solved.

Existing studies for accessing web documents within highly constrained system resources have already been conducted, including "device-specific authoring", "multiple-device authoring", There are three different levels of "client-side navigation."

The authoring technique for a specific device is a technique applied to a wireless Internet service currently being used by a wireless carrier and uses a standard protocol such as WAP. This is a technique to pre-authorize only a part of a large amount of web documents to be suitable for a specific device and to access the web document only through the specific device. In order to apply these techniques, web documents must already be converted to suit the particular device.

A more general model is assumed than the authoring technique for a specific device. This is a technique for classifying portable information devices into a plurality of groups, authoring a plurality of modified web documents in advance to suit individual groups, and serving web documents suitable for a specific group. In a similar way, you can define a style sheet to suit your environment, or attach a style sheet that targets a specific device to a web document, enabling a screen display that is appropriate for that particular device. have. The style sheet defines structurally related attributes of the document's display (for example, the red 16 points of the document's high-level header).

Finally, client-side transformations are distinguished in that the two visible techniques described above are server-side transformations. If the server-side transformation techniques are those that modify the web document on the server side in advance so that they are suitable for the client, the client-side transformation technique allows the user to modify the area of the web document that is viewed at a specific time interactively. Technique (e.g. scroll bar). Similar techniques have been introduced to allow users to zoom a web document.

The techniques outlined above provide a partial solution for accessing authored web documents assuming a wired Internet environment in a wireless Internet environment, but not a general solution.

For example, conversion techniques that assume a specific device or multiple groups of portable information terminals are difficult to apply at the present time when various portable information terminals are produced. Moreover, most of the contents provided by the web document at the level of conversion. It is still in a very rudimentary stage, such as cutting off the material, and its scope of application is quite limited. In addition, there are very limited aspects, such as a lot of modifications to the WWW environment that currently assumes a desktop PC has a lot of problems to access any web document.

Conventional web page conversion techniques, as described above, have been converted in consideration of structural aspects of web documents when converting web documents to meet the performance of portable information devices. It can be seen that it is an element that restricts access to arbitrary web documents.

According to the present invention, when converting web documents to suit the performance of a portable information device, the semantic organization aspect of a web document can be determined to a certain level using a semantic database as well as the structural aspects inside the web document. I thought about it.

The object of the present invention is to provide a suitable mediator between a portable information device and a server providing a web document, and to convert a web page provided by the web server into a web page by using a semantic database. To provide a device.

Another object of the present invention is to change the web document to an intermediate form suitable for applying the conversion technique, and then to filter the document content to some extent using a semantic database, and to finally create a rewritten document through a rewriting technique It is to provide a page conversion method.

Web page converting apparatus and method using a semantic database according to the present invention for realizing the above object, in rewriting the web documents authored to join the wired Internet environment to the wireless Internet environment, As a result, the contents of some documents may be removed from the web document and rewritten.

According to the present invention, a more general methodology is proposed for the problem of inconsistency between the performance of a portable information device and the performance required by a web document without changing the existing WWW environment. Access to Web documents is now smoother, increasing the number of Web pages accessible from the wireless Internet to the wired Internet level.

1 is a configuration diagram of an Internet server / client system to which a web page converting apparatus according to the present invention can be applied.

2 is a block diagram of a web page converting apparatus using a semantic database according to the present invention;

3A is a tree data structure diagram of an intermediate form of representation used in the transformation technique according to the present invention;

3B is a tree data structure diagram of the web document of FIG. 3A rewritten by an outlining technique according to the present invention;

4 is a flowchart illustrating a web page conversion method using a semantic database according to the present invention;

5 is a web document authored for a desktop computer environment;

6a to 6c illustrate a web document converted from only the structural aspects of the web document of FIG. 5;

7 is a web document obtained by converting the web document of FIG. 5 using a semantic database according to the present invention.

<Explanation of symbols for the main parts of the drawings>

1: HTTP client for mobile 2: Web server

3: proxy server 30: web page conversion device

31: HTML Analyzer 32: Semantic Database

33: intermediate form changer 34: filter

35: Reauthoring Tool

There may be a plurality of embodiments of the present invention. Hereinafter, preferred embodiments will be described in detail with reference to the accompanying drawings. This embodiment allows for a better understanding of the objects, features and advantages of the present invention.

1 is a configuration diagram of an internet server / client system to which a web page converting apparatus according to the present invention is applicable, and shows an example of an environment in which the web page converting apparatus is included in a proxy server for wireless Internet access.

The mobile HTTP client 1 requests the proxy server 3 for the necessary web document without directly requesting the web document from the web server 2, and the proxy server 3 sends the requested web page to the web server. It is read in (2). The read web document is appropriately converted to meet the specifications of the HTTP client via the web page conversion device 30 that is operated internally by the proxy server 3. The proxy server 3 delivers the finally converted web page to the mobile HTTP client 1. In the figure, reference numeral 4 is a WAP gateway, 5 is a WAP client, and 6 is an on-demand server.

2 is a block diagram of a web page converting apparatus 30 using a semantic database according to the present invention, including an HTML analyzer 31, a semantic database 32, an intermediate form converter 33, a filter 34, and a rewriting tool. It is made of 35.

The HTML analyzer 31 is a document analysis means for receiving an HTML document from the web server 2 as an input according to a user's web page request and analyzing the electronic document format of the web document.

The semantic database 32 stores which parts of a particular web page are important or not important and the specifications of the portable information device. That is, it stores how much weight (depending on the importance of the contents) of each component (such as a picture or a table) makes up a particular web page. In this case, the information contained in the semantic database is a weight for each component of the web page, assuming that it is provided by the server side that provides the web document or is built by extracting a certain level of information from the web page conversion device. do.

The intermediate form converting unit 33 is an intermediate form converting means for converting the web document into an intermediate form for applying a conversion technique, and converts the web document based on the document format analysis information by the HTML analyzer 31. .

3A is a tree data structure diagram which is an intermediate form of expression used in the conversion technique according to the present invention, and the HTML document is converted into a tree data structure which is an intermediate form of representation in order to apply the document conversion technique by analyzing its source. If it is.

The filter 34 is a filtering means for removing some document contents from the web document. The filter 34 is information about the weight stored in the semantic database 32 and the portable information in the web document converted to the intermediate form through the intermediate type switcher 33. Filter the contents of some documents, taking the device's specifications into account. For example, if a user's portable information device is unable to process Java or an image, or contains information such as advertisements that are unnecessary to the user, the filter 34 may remove the image, Java, and advertisement appearing in the intermediate form. do.

The rewriting tool 35 authors the web document passed through the filter 34 through the rewriting technique and provides it to the mobile HTTP client 1.

FIG. 3B is a case in which the web document of FIG. 3A is rewritten by an outlining technique according to the present invention, and creates another tree from a tree data structure, which is an intermediate form of representation.

4 is a flowchart for explaining a web page conversion method using a semantic database according to the present invention, and FIGS. 5 to 7 are webs for explaining an example of accessing a web document in a wireless Internet environment according to the present invention. As an example of a document, FIG. 5 is a web document assuming a desktop PC environment, and FIGS. 6A to 6C are web documents converted only in consideration of structural aspects of the web document, and FIG. 7 uses a semantic database according to the present invention. Converted Web Documents.

Hereinafter, a web page conversion process according to the present invention will be described with reference to FIGS. 4 to 7.

First, when a web document manufactured to be connected to a wired Internet environment is requested by a mobile HTTP client 1 such as a portable information device, the proxy server 3 reads the web document from the web server 2. .

If the semantic database does not have any information about the web document to be accessed by the user, the web document of FIG. 5 only considers structural aspects of the web document as shown in FIGS. 6A to 6C (S406). The authoring tool 35 rewrites the web pages into three web pages (S407). In other words, if there is no information on the home page in the semantic database yet, it is simply rewriting the web page by the rewriting tool 35 considering only the structural aspects of the web document.

However, if the semantic database contains data for the web document to be accessed by the user, the web page converting apparatus 30 considers the structural aspects of the web document and the weights of the components included in the semantic database together, as shown in FIG. 7. The documents will be rewritten.

In other words, after analyzing the electronic document format through the HTML analyzer 31, the intermediate format converter 33 converts the document of FIG. 5 into the intermediate format representation suitable for applying the conversion technique (S401 to S403). In consideration of the weight of the components included in the database and the specification of the portable information device, the filter 34 filters the document content of FIG. 5 to some extent (S405), and finally converts it through the rewriting technique through the rewriting tool 35. It is to produce a web document (S407).

In the case of FIG. 7, the web document of FIG. 5 has a high weight for an article dealing with soccer and movies. When the document is converted, more meaningful content (high weighted content recorded in the database) is highlighted. have.

As described above, the present invention can consider the semantic aspects of the web document to a certain level in converting the web document of the wired Internet environment to be suitable for the wireless Internet environment, and thus meets the needs of the user more than conventional conversion technologies. The present invention can provide a suitable web document, and the present invention makes access to existing web documents for wired internet, which is currently only limited access, much smoother than before. There is a liftable effect.

Claims (4)

A web page converting apparatus for rewriting web documents authored to be connected to a wired internet environment to be joined to a wireless internet environment, An apparatus for converting a web page using a semantic database, wherein a semantic database is used to remove and rewrite some document contents from a requested web document. The apparatus of claim 1, wherein the web page converting apparatus Document analysis means for analyzing the electronic document format of the web document according to the user's web page needs; Information storage means for storing weights of components of the web page; An intermediate form converting means for converting the web document into an intermediate form of expression for applying a conversion technique based on the document format analysis information; Filtering means for removing some document contents from the web document of the intermediate form using the semantic database; A web page converting apparatus using a semantic database including a rewriting tool for rewriting the web document from which the contents of the partial document are removed using a semantic database through a rewriting technique. A web page conversion method for rewriting web documents authored to be connected to a wired internet environment to be joined to a wireless internet environment. A method of converting a web page using a semantic database, characterized in that some document contents are removed from the web document and rewritten according to weights of components of the web page stored in the semantic database. The method of claim 1, wherein the web page conversion method Converting a web document authored in a wired Internet environment into an intermediate form for applying a conversion technique by analyzing the web document according to the web page request; Removing some document contents from the web document of the intermediate form using the semantic database; A web page conversion method using a semantic database, comprising the step of re-writing the web document from which the content of the part of the document is removed through a rewriting technique using a semantic database to suit a wireless Internet environment.