JP2010282327A - Format conversion system, format conversion method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To create a style sheet corresponding to format information for determining appearance in a structured document and to refer to the created style sheet from the structured document in a format conversion system for the structured document. <P>SOLUTION: A conversion part 12 extracts the format information for determining the appearance from a document element of the structured document, and creates a style set corresponding to the extracted format information. A selector name generating part 13 generates a unique selector name to the style set created in the conversion part 12, and stores a style sheet that connects the selector name to the style set, in a style sheet storage part 23. The conversion part 12 converts the format information set to the structured document, into attribute information indicating the style sheet including the style set as a component. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structured document format conversion system, format conversion method, and program. The present invention relates to a format conversion system, a format conversion method, and a program for separating document structure and format information.

  With the development of information and communication technology, it is possible to exchange information in a wide range of individuals, companies, local governments, and so on. Numerous systems that cooperate with each other are built on the Internet, Web services are provided, and EDI (Electronic Data Interchange) is performed.

  In such a situation, structured documents have flexible expression capabilities for structuring document data and are suitable for processing by computers, so that information distribution between computer systems and in computer systems It is attracting attention as a common format for information processing and information storage.

  XML (Extended Markup Language) is known as a typical structured document. In XML, a user can freely define a tag for giving meaning to data in a document. By embedding this tag in the document, it is possible to clarify the meaning and structure of the data in the document, and it is possible to extract necessary data and convert the format to a different structure by computer processing.

In XML, format information for determining document structure and appearance is strictly divided. As a format indicating this format information, CSS (Cascading Style Sheet), XSL (eXtensible)
Stylesheet Language) is known. Further, XSLT (XML Stylesheet Language Transformations) is known as a language for transforming a document described in XML into another XML document. These languages for describing format information are called style sheet languages.

  Here, the format of the structured document will be described. A string enclosed by a pair of "<" and ">" is "tag", "<string>" is "start tag", "</ string>" is "end tag", start tag to end tag The entire character string up to "document element", the character string between the start tag and end tag is "element content", the name of the element described in the tag is "tag name" or "element name", document element The additional information for is called “attribute”. The attribute is described in the start tag and described in the format of “attribute name =“ value ””. The document element may have a hierarchical structure that includes other document elements. That is, the element content is composed of a plurality of character strings or a plurality of document elements.

  A style sheet in CSS is described in the following format. "Selector {property: value}". A "property: value" pair is called a "style". Multiple styles can be listed by separating them with ";". A case where one style and a plurality of styles are enumerated are collectively expressed as a “style set”. The “selector” is a part that designates a document element to which a style set is applied. “Property” is a part for specifying the type of style, and “Value” is a value set in the property.

  Documents created in XML are very useful for data processing on a computer because necessary information can be easily extracted or converted to a format for use for other purposes. . Therefore, a technique for easily constructing an XSLT for converting the format of a general document or an electronic document into the XML format, or performing format conversion between XML documents has been devised.

  On the other hand, many documents and systems provided by Web services that have been widely spread in recent years are described in HTML (HyperText Markup Language). An HTML document is also a kind of structured document, but it is created for the purpose of expressing Web pages efficiently and in style, so format information for colors, fonts, and layout is embedded as attributes in tags. Often described in an oval form.

  However, in 1997, the specification of HTML4.0 was announced by the World Wide Web Consortium (W3C), and the specification for incorporating style sheets was introduced to separate the display method and layout related parts from the HTML document. It is now recommended to control with style sheets.

  In addition, Non-Patent Document 1 describes the font type, font size, character color, background color, margin, etc. of each document description element constituting the web content in order to improve accessibility to the elderly and disabled. It is described that the description of the decorative style is recommended to be described using a style sheet separately from the document structure. Here, the web content refers to all information and services accessed using a web browser or the like, and includes structured documents such as HTML documents.

  As described above, format information relating to colors, fonts, and layouts in an HTML document is required to be separated from the document structure and described by a style sheet. The page is provided in a format in which the document structure and the format information are mixed as before.

  For this reason, there is a need for a technique for converting the format of an HTML document in which format information about color, font, and layout is embedded into a format separated into document structure and format information.

  An example of a conventional format conversion system is described in Patent Document 1. In Patent Document 1, HTML and CSS files distributed via the Internet are read, color / character / layout information is extracted, and color change definitions and layout change definitions created in advance by specialization are applied. A system that creates a new style definition file and changes the display so that people with color blindness and color blindness can easily read the information is described.

  An example of another conventional format conversion system is described in Patent Document 2. In Patent Document 2, HTML data is created by converting the content of an XML document in accordance with the conversion rules of the format program, the HTML data is displayed on an editor, and an editing operation is performed, whereby the XML document and the format program are converted. A format conversion system for changing contents is described.

  An example of another conventional format conversion system is described in Patent Document 3. In Patent Document 3, a digitized document that is an unstructured document is read, and a hierarchical level on the document structure is determined from the appearance style in the document based on a preset basic analysis rule, thereby forming a structured document. is doing.

Japanese Patent Laid-Open No. 2005-031983 JP 2006-059243 A JP 2007-164705 A

“JIS X 8341-3 Design Guidelines for the Elderly and the Handicapped-Information Communication Equipment, Software and Services-Part 3: Web Content”, published by the Japanese Standards Association, June 20, 2004, p3

  The first problem in Patent Documents 1 to 3 is that format information such as colors, fonts, and layouts set for each document element in a structured document is not extracted and converted into a style sheet format. It is. This is because the purpose of the prior art is to convert values of format information such as colors, characters, layouts, etc., or to convert the document structure of a structured document itself.

  For example, in Patent Document 1, color / character / layout information is extracted and tag information is changed or color information / layout information is changed according to the document structure and layout classification. Is intended to change the value in accordance with the color conversion definition and layout conversion definition defined in advance, and the format information in the HTML document is not converted to the style sheet format.

  Patent Documents 2 and 3 aim at format conversion of the document structure itself of the structured document, and do not mention format information extraction or conversion.

  The second problem in Patent Documents 1 to 3 is that many of the structured document format conversion systems require the user to edit the format conversion itself or as a means of conveying the format conversion method to the system. It is a point.

  This is because, for example, in Patent Document 1, editing work by an editing editor is required to create the changed style definition file and the changed structured document file. Also, in Patent Document 2, when creating HTML data from XML data, editing work by the user is required to instruct the conversion rule.

[Object of invention]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to make it possible to create a style sheet corresponding to format information for determining the appearance in a structured document, and to convert the created style sheet from a structured document. Is to provide a system.

A first format conversion system according to the present invention includes:
Extracting format information for determining its appearance from the document elements of the structured document, creating a style set according to the extracted format information, and the format information set in the structured document, A conversion unit for converting into attribute information indicating a style sheet having the style set as a constituent element;
A selector that generates a unique selector name for the style set created by the conversion unit, and that executes a generation process of storing in the style sheet storage unit a style sheet that combines the generated selector name and the style set A name generation unit.

A first format conversion method according to the present invention includes:
A first step in which a computer extracts format information for determining its appearance from document elements of a structured document and creates a style set according to the extracted format information;
The computer generates a unique selector name for the style set created in the first step, and stores a style sheet obtained by combining the generated selector name and the style set in a style sheet storage unit. A second step;
And a third step of converting the format information of the structured document into attribute information indicating the style sheet.

The first program according to the present invention is:
A program for causing a computer to function as a format conversion system,
The computer,
Extracting format information for determining its appearance from the document elements of the structured document, creating a style set according to the extracted format information, and the format information set in the structured document, A conversion unit for converting into attribute information indicating a style sheet having the style set as a constituent element;
A selector that generates a unique selector name for the style set created by the conversion unit, and that executes a generation process of storing in the style sheet storage unit a style sheet that combines the generated selector name and the style set It functions as a name generator.

  The first effect of the present invention is that a style sheet corresponding to format information for determining the appearance of colors, fonts, layouts, and the like included in a structured document can be created. A second effect of the present invention is that a style sheet created based on format information in a structured document can be referred to from the structured document.

It is a block diagram which shows the structural example of the 1st Embodiment of this invention. It is a flowchart which shows the process example of 1st Embodiment. It is a block diagram which shows the structural example of the 2nd Embodiment of this invention. It is an example of the structured document used as input for explaining an example of the first exemplary embodiment of the present invention. It is an example of the syntax analysis result of the HTML document shown in FIG. It is an example of the conversion rule table which the conversion rule memory | storage part 22 has stored. It is an example of the mapping table for setting a font size. It is an example of the structured document which deleted the format information. It is an example of the style sheet corresponding to the format information extracted from the structured document. It is an example of a structured document to which link information is added that is output from the output unit.

  Next, the best mode for carrying out the present invention will be described in detail with reference to the drawings. Referring to FIG. 1, the first embodiment of the present invention includes a data processing device 1 that operates under program control and a storage device 2 that stores information.

  The data processing device 1 includes an input unit 11, a conversion unit 12, a selector name generation unit 13, and an output unit 14. Each of the units 11 to 14 is realized on the data processing device 1 by the data processing device 1 reading and executing a program for realizing each of the components recorded in a storage medium such as a disk. . The storage device 2 includes a document element storage unit 21, a conversion rule storage unit 22, and a style sheet storage unit 23.

  The input unit 11 acquires a structured document from outside, parses the structured document, extracts document elements, and stores the extracted document elements in the document element storage unit 21.

  The conversion rule storage unit 22 stores a rule for creating a style set corresponding to attribute information (format information) related to colors, fonts, and layouts set in the document element, and a format (for example, tag name) of the document element. Holds the rules for conversion.

  The conversion unit 12 takes out the document elements held in the document element storage unit 21 and creates a style set corresponding to the format information in the document elements based on the conversion rules stored in the conversion rule storage unit 22. To the selector name generation unit 13 and converts the format of the document element as necessary.

  The selector name generation unit 13 searches the style sheet storage unit 23 for a style sheet that holds the same style set as the style set passed from the conversion unit 12. If not, a unique selector name is generated, the selector name and the style set passed from the conversion unit 12 are combined, stored in the style sheet storage unit in the style sheet format, and the selector name Is notified to the conversion unit 12. If it exists, the selector acquires the style sheet selector name that holds the same style set as the style set passed from the conversion unit 12 from the style sheet storage unit 23 and notifies the conversion unit 12 of the selector name.

  The conversion unit 12 changes the attribute information of the currently processed document element according to the selector name passed from the selector name generation unit 13. That is, the attribute information of the document element is changed to indicate the style sheet for the document element.

  The output unit 14 outputs the style sheet group stored in the style sheet storage unit 23 as a style sheet file, and outputs the document element group stored in the document element storage unit 21 as a structured document. At this time, the output unit 14 sets information (link information) for enabling reference to the style sheet file in the structured document.

  Next, the overall operation of the present embodiment will be described in detail with reference to the flowcharts of FIGS.

  The input unit 11 acquires a structured document from the outside, performs syntax analysis of the structured document, extracts a document element group, and stores it in the document element storage unit 21 (step S101). The conversion unit 12 refers to the document element storage unit 21 (S102), determines one document element x to be analyzed in order, and repeats the processing from step S103 to step S108. When n document elements exist, processing is performed on document elements 1 to n. If processing has been completed for all document elements, the process proceeds to step S109, and if there are document elements to be processed, the process proceeds to step S104 (step 103).

  The conversion unit 12 refers to the conversion rule storage unit 22, extracts attribute information (format information) regarding the color, font, and layout from the document element x according to the conversion rule, and creates a style set corresponding to the extracted attribute information. Then, the style set is passed to the selector name generation unit 13 (S104). In step S104, the format of the document element x is changed as necessary according to the conversion rule.

  The selector name generation unit 13 refers to the style sheet storage unit 23 and searches for a style sheet having the same style set as the style set passed from the conversion unit 12 (S105). If there is no style sheet having the same style set, a unique selector name is generated, and the style sheet storage unit 23 generates the selector name and the style set passed from the conversion unit 12 in the form of a style sheet. (S106). On the other hand, if there is a style sheet having the same style set, the selector name of the style sheet is acquired (S107). The selector name generation unit 13 passes the generated or acquired selector name to the conversion unit 12.

  The conversion unit 12 converts the attribute of the document element x stored in the document element storage unit 21 according to the selector name passed from the selector name generation unit 13 into one indicating the style sheet (S108). When the process of step S108 is completed, the process returns to step S102, and the process is continued for the next document element.

  After the processing is completed for all the document elements (S103), the output unit 14 outputs the style sheet file with reference to the style sheet storage unit 23, and also refers to the document element storage unit 21 to store the document element. A structured document including a document element stored in the unit 21 and link information for referring to the style sheet file is created and output (S109).

[Effect of the first embodiment]
Next, the effect of this embodiment will be described.

  In the present embodiment, the conversion unit 12 extracts format information for determining appearance from the document elements in the document element storage unit 21, creates a style set corresponding to the format information, and generates a selector name generation unit. 13 generates a unique selector name for the style set created by the conversion unit 12, and combines the selector name and the style set output from the conversion unit 12 to create a style sheet. Therefore, it is possible to create a style sheet corresponding to the format information for determining the appearance included in the structured document.

  In the present embodiment, the conversion unit 12 converts the format information in the document element into attribute information (value is a selector name) indicating a style sheet corresponding to the format information. Therefore, the format in the structured document The style sheet created based on the information can be referenced from the structured document.

  Further, in the present embodiment, the selector name generation unit 13 searches the style sheet storage unit 23 for a style sheet having the same style set as the style set passed from the conversion unit 12. Since it is configured so that it can be acquired, if the same decoration is applied to multiple document elements in a structured document, the appearance of the multiple document elements can be changed by simply modifying one style sheet. The format can be converted to a format that can be changed.

  Further, in the present embodiment, instead of the format information, a document element storage unit 21 that stores a document element including attribute information indicating a style sheet corresponding to the format information, and a style sheet storage that stores a set of style sheets. Since the output unit 14 can refer to each storage unit, a structured document including format information such as colors, fonts, and layouts is left as a structured document. Can be output separately in a style sheet file that holds decorative format information of each document element.

[Second embodiment of the present invention]
Next, a second embodiment of the present invention will be described with reference to the drawings.

  Referring to FIG. 3, the second embodiment of the present invention includes a data processing device 1a that operates under program control and a storage device 2b that stores information. The data processing device 1a is different from the data processing device 1 shown in FIG. 1 in that a conversion unit 12a is provided instead of the conversion unit 12, and a style extraction unit 15 is added. The storage device 2 is different from the storage device 2 shown in FIG. 1 in that the conversion rule storage unit 22 is not provided.

  In the first embodiment, the style extraction unit 15 creates the style set that the conversion unit 12 refers to the conversion rules registered in the conversion rule storage unit 22 and the tag name of the document element. The conversion process is performed according to the logic incorporated in the program without referring to the conversion rule. This program determines whether or not the tag name of the document element to be processed is a predetermined tag name. If the tag name is a predetermined tag name, the program responds to the tag name. Create a set of styles, change the tag name, or determine whether the attribute name of the document element to be processed is a predetermined attribute name. If it is, the style set corresponding to the attribute name is created.

  The conversion unit 12a is different from the conversion unit 12 of the first embodiment in that the style extraction unit 15 performs style set creation processing and document element conversion processing.

  Next, the operation of the present embodiment will be described. The operation of the present embodiment is almost the same as the operation shown in the flowchart of FIG.

  In step S104, first, the conversion unit 12a passes the document element x currently being processed to the style extraction unit 15. Thereby, the style extraction unit 15 creates a style set corresponding to the format information in the document element x, and returns the created style set to the conversion unit 12a. Further, the document element x is converted as necessary, and the converted document element x is returned to the conversion unit 12a. The conversion unit 12 a passes the style set returned from the style extraction unit 15 to the selector name generation unit 13. In addition, when the document element x is returned from the style extraction unit 15, the conversion unit 12 a converts the document element x stored in the document element storage unit 21 into the converted document element returned from the style extraction unit 15. Replace with x. The above is the process performed in step S104. In other steps, processing similar to that of the first embodiment is performed.

[Effect of the second embodiment]
According to the present embodiment, the same effect as in the first embodiment can be obtained.

  Next, examples of the first embodiment of the present invention will be described.

  In this embodiment, as an example of a structured document including format information such as color, font, and layout, the operation of the format conversion system will be described for the HTML document shown in FIG.

  The input device 11 reads the HTML document shown in FIG. 4 from the outside, analyzes the document structure of the HTML document, clarifies the hierarchical structure as shown in FIG. 5, and stores the result in the document element storage unit 21. . In FIG. 5, the attribute information in the document element is not shown in order to make the drawing easier to see, but in practice, <body bgcolor = “# e0e0e0” text = “# 000000”> Contains attributes.

  The conversion unit 12 sequentially acquires document elements from the document element storage unit 21 and performs conversion processing. Here, the document element refers to <html element>, <body element>, <h1 element>, and the like shown in FIG.

  FIG. 6 is an example of a conversion rule table stored in the conversion rule storage unit 22. The conversion rule table of this embodiment includes a tag name 61 indicating a tag name to be converted, an attribute name 62 indicating an attribute name to be converted, a post-conversion tag name 63 indicating a post-conversion tag name, and a style of the post-conversion style. It consists of a column of converted style 64 indicating the format. In the tag name 61 column, a line in which “*” is described indicates that it can be applied to all tag names. In the column of the attribute name 62, a line in which “-” is described indicates that no attribute conversion is performed. In the post-conversion tag name 63 column, a line in which “*” is described indicates that tag name conversion is not performed. In the post-conversion style 64 column, the description “& 1” represents the attribute value of the attribute indicated by the attribute name. In the column of the style 64 after conversion, the description “& FONT-SIZE” indicates that an arithmetic process for determining the font size set in the style sheet is performed.

  FIG. 7 is a mapping table between the font size level and the font size specified by the style.

  An arithmetic process for determining the font size will be described below. There are two types of font size levels, “standard font size level” and “current font size level”, and the initial value is “3”. In the font element, big element, and small element, the font size level in the element can be changed, and a font having a size corresponding to the level is used.

  When a numerical value is directly described in the size attribute of the font element, the level of the specified numerical value is set as the current font size level, and the size specification value corresponding to the level of the corresponding font size in FIG. The font size is set for the sheet. For example, when “1” is designated, “0.5 em” corresponding to the font size level “1” in FIG. 7 is set as the font size to be set in the style sheet.

  If a signed numeric value is described in the size attribute of the font element, the result of adding the standard font size level and the signed numeric value is the current font size level, and the size corresponding to that level The specified value is the font size set in the style sheet. For example, when “+2” is designated, “5” obtained by adding “2” to the standard font size “3” is set as the current font size level, and the corresponding size designation “1.5 em” is set. The font size is set in the style sheet. When “−1” is designated, “1” is subtracted from the standard font size “3”, “2” is set as the current font size level, and the corresponding size designation “0.8 em” is set. "Is the font size set in the style sheet. If any other expression is made in the size attribute of the font element, that expression is used as it is as the font size.

  For the big element, the current font size level is incremented by 1, and the size designation value corresponding to the value is set as the font size to be set in the style sheet. For the small element, the current font size level is decremented by 1, and the size designation value corresponding to the value is set as the font size to be set in the style sheet.

  Next, the format conversion process of the conversion unit 12 will be specifically described using the HTML document shown in FIG. The conversion unit 12 sequentially retrieves document elements from the document element storage unit 21 in which the syntax analysis result (see FIG. 5) for the HTML document is stored. First, an html element is extracted and processed. The conversion unit 12 refers to the conversion rule table shown in FIG. 6, and since there is no match in the tag name and attribute name of the html element, nothing is done and the process of the html element is terminated.

  Next, the conversion unit 12 extracts the body element and performs processing. Here, the body element includes a bgcolor attribute. In order to match the rule on the third line of the conversion rule table shown in FIG. 6, the converted style “background-color: # e0e0e0” is acquired, and the bgcolor attribute of the body element is deleted. Here, “# e0e0e0”, which is the attribute value of the bgcolor attribute, is set in the “& 1” portion of the style after conversion. The body element includes a text attribute. The style of “color: # 000000” is acquired by the rule on the second line of the conversion rule table, and the text attribute of the body element is deleted.

The conversion unit 12 passes the style set including the two styles to the selector name generation unit 13. The selector name generation unit 13 refers to the style sheet storage unit 23 and confirms whether the same style set exists. Since the style sheet has not been registered yet, the same style set does not exist this time. Therefore, the selector name generation unit 13 generates a unique selector name. In this embodiment, if the unique selector name is a name obtained by adding a three-digit serial number to the fixed character string “sel”, the unique selector name is “sel001”. The selector name generation unit 13 creates the following style sheet using the generated selector name, stores it in the style sheet storage unit 23, and returns the selector name to the conversion unit 12.
sel001 {
background-color: # e0e0e0;
color: # 000000;
}

  The conversion unit 12 adds the selector name acquired from the selector name generation unit 13 as the class attribute of the body element, and ends the processing of the body element. As a result, the start tag of the body element is <body class = “sel001”>.

  Next, the conversion unit 12 extracts the h1 element from the document element storage unit 21 and performs conversion processing. Since the h1 element includes the align attribute, the style “text-align: center” is acquired according to the fifth line of the conversion rule table, and the align attribute is deleted. Further, since the h1 element includes the style attribute, the style “color: # 0000ff; font-size: 150%” is acquired and the style attribute is deleted according to the first line of the conversion rule table. Here, “& 1” is described in the style after conversion in the first line of the conversion rule table, which means that the attribute value of the style attribute is applied as it is as the style. The conversion unit 12 passes the three style sets to the selector name generation unit 13.

The selector name generation unit 13 refers to the style sheet storage unit 23, confirms that the same style set does not exist, and generates a unique selector name “sel002”. The selector name generation unit 13 creates the following style sheet using the generated selector name, stores it in the style sheet storage unit 23, and returns the selector name to the conversion unit 12.
sel002 {
text-align: center;
color: # 0000ff;
font-size: 150%;
}

  The conversion unit 12 adds the selector name acquired from the selector name generation unit 13 as the class attribute of the h1 element, and ends the processing of the h1 element. As a result, the start tag of the h1 element is <h1 class = “sel002”>.

Next, processing for the font element and big element in the fifth line of the HTML in FIG. 4 will be described. In the “font” element, a size attribute is set, and “+2” is set as the attribute value. In accordance with the arithmetic processing for determining the font size described above, the current font size level is set to “5”, and a size of “1.5 em” is obtained from the mapping table of FIG. Further, since the next big element is included in the font element, the current font size is determined according to the calculation process for determining the font size while maintaining the current font size level “5”. The level is incremented by one and set to “6”, and the size of “2.0 em” is acquired from the mapping table of FIG. As a result, as a style sheet,
.sel004 {
font-size: 1.5 em;
}
.sel005 {
font-size: 2.0 em;
}
Are created.

Also, the font element and big element on the fifth line of HTML in FIG. 4 match the rules on the 16th line and the 14th line of the conversion rule table shown in FIG. 6, respectively. Converted. Since the selector names of the style sheets corresponding to the font element and big element are sel004 and sel005, respectively.
<Span class = "sel004"> Character string 2
<Span class = "sel005"> Character string 3
</ Span>
</ Span>
The format is converted as follows.

  Next, processing for the h1 element on the sixth line of the HTML in FIG. 4 will be described. Since the style set acquired from the processing of the h1 element is the same as the style set acquired by the h1 element in the second row, the selector name generation unit 13 selects the selector when searching the style sheet storage unit 23. The name “sel002” can be acquired. Therefore, the selector name generation unit 13 returns the acquired selector name to the conversion unit 12 without registering a new style sheet. The conversion unit 12 adds a class attribute using the passed selector name “sel002”. In this way, the structured document finally stored in the document element storage unit 21 and the style sheet stored in the style sheet storage unit 23 are as shown in FIGS.

The output unit 14 gives a file name to the style sheet group and outputs it as a text file, and additionally writes the output style sheet file name as link information to the structured document data stored in the document element storage unit 21. Output as a structured document. Link information <link rel = "stylesheet" output from the output unit 14 in FIG.
Indicates a structured document appended with href = "mysheet.css" content = "text / css">. In this example, the style sheet file name is "mysheet.css".

DESCRIPTION OF SYMBOLS 1, 1a ... Data processing device 2, 2a ... Storage device 11 ... Input part 12 ... Conversion part 13 ... Selector name generation part 14 ... Output part 15 ... Style extraction part 21 ... Document element storage part 22 ... Conversion rule storage part 23 ... Style sheet storage unit 61 ... tag name 62 ... attribute name 63 ... converted tag name 64 ... converted style

Claims (15)

Extracting format information for determining its appearance from the document elements of the structured document, creating a style set according to the extracted format information, and the format information set in the structured document, A conversion unit for converting into attribute information indicating a style sheet having the style set as a constituent element;
A selector that generates a unique selector name for the style set created by the conversion unit, and that executes a generation process of storing in the style sheet storage unit a style sheet that combines the generated selector name and the style set A format conversion system comprising a name generation unit. The format conversion system according to claim 1,
The format conversion system, wherein the attribute information indicating the style sheet includes a selector name of the style sheet as a value. The format conversion system according to claim 2, wherein the selector name generation unit searches the style sheet storage unit and can search for a style sheet that includes the same style set as the style set created by the conversion unit. Does not execute the generation process,
When the style sheet is searched by the selector name generation unit, the conversion unit converts the format information into attribute information including a selector name of the searched style sheet as a value. Conversion system. The format conversion system according to any one of claims 1 to 3,
A format conversion system comprising: an output unit that outputs a style sheet stored in the style sheet storage unit as a style sheet file and embeds link information to the style sheet file in the structured document. The format conversion system according to any one of claims 1 to 4,
A conversion rule storage unit storing rules for creating a style set according to the format information; and
The format conversion system, wherein the conversion unit creates a style set corresponding to format information in accordance with a rule stored in the conversion rule storage unit. The format conversion system according to claim 5, wherein
The format conversion system, wherein the conversion rule storage unit stores a style set creation method for the format information of the attribute name in association with the attribute name. The format conversion system according to any one of claims 1 to 4,
Logic for creating a style set corresponding to the input format information is incorporated, and a style extraction unit for creating a style set corresponding to the format information input according to the logic is provided, and
The conversion unit creates a style set corresponding to the format information by outputting the extracted format information to the style extraction unit. A first step in which a computer extracts format information for determining its appearance from document elements of a structured document and creates a style set according to the extracted format information;
The computer generates a unique selector name for the style set created in the first step, and stores a style sheet obtained by combining the generated selector name and the style set in a style sheet storage unit. A second step;
A format conversion method comprising: a third step in which the computer converts the format information of the structured document into attribute information indicating the style sheet. The format conversion method according to claim 8, wherein
The format conversion method, wherein the attribute information indicating the style sheet includes a selector name of the style sheet as a value. The format conversion method according to claim 9, wherein
The computer includes a fourth step of retrieving a style sheet including the same style set as the style set created in the first step from the style sheet storage unit; and
If the computer can retrieve the style sheet in the fourth step, the computer does not execute the second step, and in the third step, the format information is used as a selector for the retrieved style sheet. A format conversion method characterized by converting into attribute information including a name as a value. The format conversion method according to any one of claims 8 to 10,
A fifth step in which the computer outputs a style sheet stored in the style sheet storage unit as a style sheet file;
And a sixth step of embedding link information to the style sheet file in the structured document. A program for causing a computer to function as a format conversion system,
The computer,
Extracting format information for determining its appearance from the document elements of the structured document, creating a style set according to the extracted format information, and the format information set in the structured document, A conversion unit for converting into attribute information indicating a style sheet having the style set as a constituent element;
A selector that generates a unique selector name for the style set created by the conversion unit, and that executes a generation process of storing in the style sheet storage unit a style sheet that combines the generated selector name and the style set A program for functioning as a name generator. The program according to claim 12,
The attribute information indicating the style sheet includes a selector name of the style sheet as a value. The program according to claim 13, wherein the selector name generation unit searches the style sheet storage unit and can search for a style sheet that includes the same style set as the style set created by the conversion unit. Without performing the generation process,
When the style sheet is searched for by the selector name generation unit, the conversion unit converts the format information into attribute information including a selector name of the searched style sheet as a value. . The program according to any one of claims 12 to 14,
A program for causing the computer to function as an output unit that outputs a style sheet stored in the style sheet storage unit as a style sheet file and embeds link information to the style sheet file in the structured document.

Images