JP7000709B2 - Information processing equipment and programs - Google Patents

Description

The present invention relates to an information processing apparatus and a program.

Today, various information is published on the network in the form of web pages. Web pages are also called HTML (HyperText Markup Language) documents and are described by HTML, which is an example of a data description language.
Although it is possible to directly generate an HTML document, in many cases, a method of generating an XML (Extensible Markup Language) document once and then converting the XML document into an HTML document using a style sheet is used. The reason is that the document and its display method can be separated.

However, conversion from an XML document to an HTML document requires a lot of resources. Therefore, for example, Patent Document 1 describes a technique for reducing resources required for conversion processing of each document by mechanically dividing a large-capacity XML document into a plurality of small-capacity XML documents. ..

Japanese Unexamined Patent Publication No. 2007-179492

However, in the method of mechanically dividing an XML document into small-capacity XML documents in units of a predetermined number of lines, the amount of data to be converted does not change, and the time required for conversion is not shortened after all.

An object of the present invention is to reduce the time required for conversion as compared with the case where the converted structured document is the conversion target regardless of whether or not the converted structured document is affected.

The invention according to claim 1 presents to a computer information that is a plurality of partial data constituting the first structured document that is a conversion source and is not referred to in the rules used for conversion of the representation format of the partial data. A function of reading an intermediate document that is not included from the storage unit and converting the intermediate document into a second structured document based on the above rule, and a second function prior to the conversion into the second structured document. The first hash value is calculated for the intermediate document for which the current conversion to the structured document of is the second and subsequent times, and the second hash value calculated at the time of the previous conversion for the intermediate document having the same name is used as described above. The function of reading from the storage unit and comparing the first hash value with the second hash value, and when the first hash value is different from the second hash value, corresponds to the first hash value. With the function of converting the intermediate document to a new second structured document and replacing the corresponding existing second structured document stored in the storage unit with the new second structured document. , Is a program to execute.
The invention according to claim 2 specifies the calculated first hash value and the second structured document corresponding to the calculated first hash value each time the first hash value is calculated. It further has a function of generating a list associated with information and storing it in the storage unit, and the first hash value stored in the list is used for the second conversion of the intermediate document at the next conversion. The program according to claim 1 , which is used as a hash value .
The invention according to claim 3 converts the new intermediate document into the second structured document and the new intermediate document when the name corresponding to the new intermediate document does not exist in the existing list . The program according to claim 2, further comprising a function of adding the first hash value calculated for the document and the information identifying the second structured document to the list.
The invention according to claim 4 registers the name in the deletion list and corresponds to the name when the name existing in the existing list does not exist in the new list generated for the new intermediate document. The program according to claim 2 , further having a function of deleting the second structured document.
The invention according to claim 5 is the program according to claim 1, further comprising a function of extracting the information referred to by the rule from the first structured document to generate the intermediate document.
The invention according to claim 6 is the program according to claim 5, wherein the intermediate document is generated in units of the second structured document converted using the rule.
The invention according to claim 7 is an intermediate piece of data that constitutes a first structured document that is a conversion source and does not include information that is not referred to in the rules used for conversion of the representation format of the partial data. A conversion unit that reads a document from a storage unit and converts the intermediate document into a second structured document based on the above rules, and a second structure prior to conversion into the second structured document. The first hash value is calculated for the intermediate document that is converted to the converted document for the second time or later, and the second hash value calculated at the time of the previous conversion for the intermediate document having the same name is stored in the storage unit. A comparison unit that compares the first hash value with the second hash value, and when the first hash value is different from the second hash value, corresponds to the first hash value. A replacement unit that converts the intermediate document into a new second structured document and replaces the corresponding existing second structured document stored in the storage unit with the new second structured document. It is an information processing device having.

According to the first aspect of the invention, the time required for conversion can be shortened as compared with the case where the first structured document is the conversion target regardless of the presence or absence of the influence on the second structured document.
According to the invention of claim 2, it is possible to distinguish between a first structured document that requires conversion and a first structured document that does not require conversion.
According to the third aspect of the invention, the time required for the change to be reflected in the second structured document can be shortened.
According to the invention of claim 4, the time required for the change to be reflected in the second structured document can be shortened.
According to the invention of claim 5, the generation of the intermediate document can be automated, and the total time required for the change to be reflected in the second structured document can be shortened.
According to the invention of claim 6, the generation of the intermediate document can be automated, and the total time required for the change to be reflected in the second structured document can be shortened.
According to the invention of claim 7, the time required for conversion can be shortened as compared with the case where the first structured document is the conversion target regardless of the presence or absence of the influence on the second structured document.

It is a figure explaining the configuration example of the web system which concerns on this embodiment. It is a figure explaining the example of the hardware composition of the information processing apparatus which concerns on this embodiment. It is a figure explaining the example of the software structure of the information processing apparatus which concerns on Embodiment 1. FIG. It is a figure explaining the image of the process by the change presence / absence determination unit. It is a figure explaining the structural example of a style sheet. It is a figure exemplifying the text HTML document, the table of contents HTML document, and the figure HTML document displayed on the browser screen of a terminal apparatus. It is a flowchart explaining the example of the processing operation executed by the signal processing unit which constitutes a document processing apparatus. It is a figure which shows the flow of the process executed in the case of the total amount conversion. It is a figure which shows the flow of the process executed in the case of the HTML conversion for the second and subsequent times. It is a figure explaining the example of the software structure of the information processing apparatus which concerns on Embodiment 2. FIG. It is a flowchart explaining the example of the processing operation executed by the signal processing unit which constitutes a document processing apparatus. It is a figure explaining the extraction process of the path type by the conversion data determination unit. It is a figure explaining the generation process of the intermediate XML document by the intermediate XML document generation part. It is a figure explaining the relationship between the concrete example of a style sheet and the value stored in the conversion path table. It is a figure explaining the relationship between the XML document and the generated intermediate XML document. FIG. 15 is a diagram illustrating an example of generating an intermediate XML document when information not used in an HTML document is added to a part of the XML document illustrated in FIG. 15. It is a figure which shows the specific example of the intermediate XML document between old and new when the modification which adds new information to the HTML document is made to the XML document. It is a figure explaining the case where the description for a new HTML document is added to the XML document. It is a figure explaining the case where the description corresponding to the old HTML document is deleted from the XML document.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings.

<Embodiment 1>
<Overall system configuration>
FIG. 1 is a diagram illustrating a configuration example of the web system 1 according to the present embodiment.
The web system 1 is composed of a server system 10 that publishes HTML documents on a network so that they can be viewed, and a terminal device 20 that executes a browser program (hereinafter referred to as "browser"). The network in this embodiment may be a local area network or the Internet.
The terminal device 20 is operated by the user and is used for browsing information published on the network. The terminal device 20 is a computer having a network communication function, and may be a stationary type or a portable type.

The server system 10 is an information processing device 100 that generates an HTML document from an XML document, and a web server 200 that transmits an HTML document stored in a URL (Uniform Resource Locator) accessed from the terminal device 20 to the terminal device 20. And these are connected to each other via the local network 11. However, the information processing apparatus 100 and the web server 200 may be connected via the Internet.
The XML document is an example of a first structured document, and the HTML document is an example of a second structured document.

In the web server 200 according to the present embodiment, the HTML document generated by the information processing apparatus 100 is associated with a specific URL and stored. The HTML document may be stored in a storage device built in the web server 200, or may be stored in an external storage device. That is, the web server 200 and the storage device may have an integrated configuration or a separate configuration.

<Configuration of information processing device>
FIG. 2 is a diagram illustrating an example of a hardware configuration of the information processing apparatus 100 according to the present embodiment.
The information processing device 100 is used for a signal processing unit 101 that executes various processing operations for converting an XML document into an HTML document, a storage device 102 that stores various programs and data, and reception of operations by an operator. It has an operation receiving device 103 and a communication device 104 for transferring data to and from an external device.

The signal processing unit 101 has a CPU (Central Processing Unit) 101A for executing a program, a ROM (Read Only Memory) 101B for storing a startup program, and a RAM (Random Access Memory) 101C used as a work area. Have.
The storage device 102 is composed of a hard disk device or the like. The storage device 102 is not limited to the device built in the information processing device 100, but may be an external device connected through the communication device 104.
The operation receiving device 103 is, for example, a keyboard or a mouse.
The communication device 104 is, for example, a USB (Universal Serial Bus) interface or a network interface.

FIG. 3 is a diagram illustrating an example of a software configuration of the information processing apparatus 100 according to the first embodiment.
The software configuration shown in FIG. 3 is realized through the execution of a program by the signal processing unit 101.
The signal processing unit 101 in the present embodiment includes a document reading unit 110 that reads the intermediate XML document 121 from the storage device 102, a change presence / absence determination unit 111 that determines whether or not there is a change for each intermediate XML document 121, and a style sheet 123. It functions as a document conversion unit 112 that converts the intermediate XML document 121 into an HTML document and a data merging unit 113 that merges the converted HTML document into an existing HTML document to generate a new HTML document.

The intermediate XML document 121 is partial data obtained by extracting the description necessary for generating the HTML document from the XML document, and is prepared for each HTML document as a display unit.
Therefore, if there are a plurality of HTML documents (in other words, if there are a plurality of style sheets 123), there are also a plurality of intermediate XML documents 121. The intermediate XML document 121 here is an example of an intermediate document.
In the case of this embodiment, the intermediate XML document 121 has already been generated and stored in the storage device 102. However, the intermediate XML document 121 may be generated by using the information processing apparatus 100 or may be generated by using another apparatus.
The intermediate XML document 121 is generated each time a change is made to the XML document.

In the following, if necessary, the XML document before the change may be referred to as the "old XML document", and the XML document after the change may be referred to as the "new XML document".
Here, the difference between old and new only represents the context of a particular change. Therefore, even if it is a new XML document in relation to a certain change, when an additional change is made, it is treated as an old XML document in relation to the additional change.
Further, the intermediate XML document 121 generated from the old XML document may be referred to as an "old intermediate XML document", and the intermediate XML document 121 generated from the new XML document may be referred to as a "new intermediate XML document".
The intermediate XML document 121 may be generated manually by the operator, or may be generated through a program process as described in the second embodiment described later.

The document reading unit 110 provides a function of reading the new intermediate XML document 121N designated by the operator as a conversion target from the storage device 102 and outputting it to the change presence / absence determining unit 111.
The hash value calculated for the old intermediate XML document 121O and the hash value calculated for the new intermediate XML document 121N are both stored in the hash value list 122 of the storage device 102.
In the following, the hash value calculated for the old intermediate XML document 121O may be referred to as an “old hash value”, and the hash value calculated for the new intermediate XML document 121N may be referred to as a “new hash value”.
In the following, the hash value list that stores the old hash value may be referred to as an "old hash value list", and the hash value list that stores the new hash value may be referred to as a "new hash value list".
If the new hash value list 122N does not exist in the storage device 102, the change presence / absence determination unit 111 calculates the new hash value and stores it in the storage device 102.
The change presence / absence determination unit 111 here is an example of a comparison unit.

The change presence / absence determination unit 111 has a function of comparing the new hash value calculated for each new intermediate XML document 121N to be converted with the old hash value stored for the old intermediate XML document 121O having a corresponding relationship. offer.
Here, having a correspondence relationship means that the names of the HTML documents associated with the individual intermediate XML documents 121 are common.
Therefore, the change presence / absence determination unit 111 first determines whether or not the name of the HTML document corresponding to the new intermediate XML document 121N exists in the old hash value list 122O stored for the old intermediate XML document 121O, and exists. When this is done, the hash value comparison process is executed.

For example, if the name of the HTML document corresponding to the new intermediate XML document 121N exists in the old hash value list 122O stored for the old intermediate XML document 121O, and the old and new hash values match, the change presence / absence determination unit 111 , It is determined that the content of the new intermediate XML document 121N and the content of the old intermediate XML document 121O are the same.
For example, even if the name of the HTML document corresponding to the new intermediate XML document 121N exists in the old hash value list 122O stored for the old intermediate XML document 121O, if the old and new hash values are different, the change presence / absence determination unit 111 may be used. It is determined that the new intermediate XML document 121N contains changes or amendments to the contents. In this case, the change presence / absence determination unit 111 registers the new intermediate XML document 121N in which the change or modification is detected in the difference list.

For example, if the name of the HTML document corresponding to the new intermediate XML document 121N does not exist in the old hash value list 122O stored for the old intermediate XML document 121O, the change presence / absence determination unit 111 performs the new intermediate XML document 121N to be processed. Judges that it was newly generated. In this case as well, the change presence / absence determination unit 111 registers the new intermediate XML document 121N in which the change or modification is detected in the difference list.
For example, the name of the HTML document existing in the old hash value list 122O stored for the old intermediate XML document 121O is the new hash value list 122N stored for the new intermediate XML document 121N (after the current document conversion process is completed). Is not present in the old hash value list 122O in relation to the new document conversion process), the change presence / absence determination unit 111 determines that the old intermediate XML document 121O has been deleted. In this case, the change presence / absence determination unit 111 registers the old intermediate XML document 121O determined to be deleted in the deletion list.

FIG. 4 is a diagram illustrating an image of processing by the change presence / absence determination unit 111.
FIG. 4 shows that a plurality of new XML documents # 1, # 2, and # 3 generated from the new XML document all have a correspondence relationship with HTML documents # 1, # 2, and # 3. There is.
The change presence / absence determination unit 111 has, for example, a new hash value # 1 calculated for the new intermediate XML document # 1 corresponding to the HTML document # 1 and an old hash value # 1 calculated for the corresponding old intermediate XML document # 1. To compare.
Of course, the change presence / absence determination unit 111 compares the new hash value # 2 with the old hash value # 2, and compares the new hash value # 3 with the old hash value # 3.

Returning to the description of FIG.
The document conversion unit 112 is limited to the new intermediate XML document 121N registered in the difference list (that is, limited to the new intermediate XML document 121N including the change or modification of the contents and the newly generated new intermediate XML document 121N). It provides a function of converting into an HTML document using the corresponding style sheet 123 and a function of storing the generated HTML document as difference conversion data 124 in the storage device 102.
Here, the style sheet 123 is an XSLT (Extensible Stylesheet Language Transformations) document, and is used to control the display format of the HTML document. The style sheet 123 is an example of an expression rule.

FIG. 5 is a diagram illustrating a configuration example of the style sheet 123. The style sheet 123 is prepared for each HTML document to be generated.
In the case of this example, the style sheet 123 includes a style sheet 123A corresponding to the text HTML document (that is, a style sheet for the text HTML document) 123A, a style sheet corresponding to the table HTML document (that is, a style sheet for the table HTML document) 123B, and the style sheet 123. A style sheet corresponding to the HTML document (that is, a style sheet for the HTML document) 123C is included.

FIG. 6 is a diagram illustrating a text HTML document, a table of contents HTML document, and a FIG. HTML document displayed on the browser screen 25 of the terminal device 20.
The display window of the text HTML document is arranged on the right side of the browser screen 25, the table of contents HTML document is arranged on the left side of the browser screen 25, and the figure HTML document is arranged on the lower left corner position in the display window of the text HTML document. There is.

Here, in the display window of the text HTML document, a document with the title "1.2 Inserting an image" is displayed.
In addition, in the window of the table of contents HTML document displayed on the left side of the text HTML document, the title of the text HTML document is "Precautions for use", and the text HTML document has three chapters. It is displayed that it is configured.
Further, in the window of the figure HTML document displayed overlaid on the text HTML document, a sample image read through the link relationship embedded in the text HTML document is displayed.

Returning to the description of FIG.
The data merging unit 113 provides a function of merging the difference conversion data 124 with the previous conversion data 125 (that is, an existing HTML document generated using the old intermediate XML document 121O) to generate the current conversion data 126. do.
For example, the data merge unit 113 adds or replaces the newly created HTML document to the existing HTML document.
Further, for example, the data merge unit 113 deletes the corresponding document from the existing HTML document based on the deletion list.
The data merge unit 113 here is an example of a replacement unit.

<Processing operation>
Subsequently, the processing operation executed by the information processing apparatus 100 will be described.
FIG. 7 is a flowchart illustrating an example of a processing operation executed by the signal processing unit 101 constituting the information processing apparatus 100.
First, the signal processing unit 101 receives the new intermediate XML document 121N (step 101). Specifically, the new intermediate XML document 121N targeted by the document reading unit 110 is read from the storage device 102.

Next, the signal processing unit 101 determines whether or not the conversion of the new intermediate XML document 121N into an HTML document is the first time (step 102). This determination is executed by the change presence / absence determination unit 111.
For example, the change presence / absence determination unit 111 determines whether or not the conversion is the first time depending on whether or not the name of the HTML document corresponding to the received new intermediate XML document 121N is included in the old hash value list 122O.
If the name of the corresponding HTML document exists, the change presence / absence determination unit 111 determines that the conversion is not the first time.
On the other hand, when the name of the corresponding HTML document does not exist, the change presence / absence determination unit 111 determines that the conversion is the first time.
When it is determined that the conversion is the first time (when an affirmative result is obtained in step 102), the change presence / absence determination unit 111 has a new hash value for each of the plurality of new intermediate XML documents 121N targeted for the conversion process. Is calculated and registered in the new hash value list 122N of the storage device 102.

Further, the signal processing unit 101 converts all of the plurality of new intermediate XML documents 121N into HTML documents using the corresponding style sheets 123 (step 103). This process is executed by the document conversion unit 112.
In the present embodiment, the conversion of all the new intermediate XML documents 121N into HTML documents is referred to as total quantity conversion.
FIG. 8 is a diagram schematically showing a flow of processing executed in the case of total amount conversion.
As shown in FIG. 8, in the case of total amount conversion, a new hash value is calculated for all the input new intermediate XML documents 121N, and the calculated new hash value is stored in the new hash value list 122N. After that, HTML conversion is executed for all the new intermediate XML documents 121N, and HTML documents corresponding to each are generated.

When it is determined that the conversion is not the first time (when a negative result is obtained in step 102), the change presence / absence determination unit 111 calculates a new hash value for each of the new intermediate XML documents 121N (step 104).
Next, the change presence / absence determination unit 111 compares the new hash value with the old hash value (step 105).
Subsequently, the change presence / absence determination unit 111 determines whether or not there is a corresponding old hash value (step 106). In other words, the change presence / absence determination unit 111 determines whether or not the name of the HTML document corresponding to the new intermediate XML document 121N exists in the old hash value list 122O corresponding to the old intermediate XML document 121O.

When an affirmative result is obtained in step 106 (when the corresponding old hash value does not exist and is newly generated), the change presence / absence determination unit 111 registers the name of the HTML document corresponding to the difference list, and the document conversion unit 112 converts the new intermediate XML document 121N into HTML with the corresponding style sheet 123 (step 108).
When a negative result is obtained in step 106 (when the corresponding old hash value exists), the change presence / absence determination unit 111 determines whether or not the new hash value and the old hash value are different (step 107).
When an affirmative result is obtained in step 107 (when the new intermediate XML document 121N is newly generated), the change presence / absence determination unit 111 proceeds to step 108 to execute HTML conversion and name registration.

On the other hand, when a negative result is obtained in step 107 (when the old intermediate XML document 121O is deleted), the change presence / absence determination unit 111 registers the name of the HTML document corresponding to the old intermediate XML document 121O in the deletion list. (Step 109).
After executing step 108 or step 109, the data merging unit 113 merges the difference conversion data 124 with the previous conversion data 125 to generate the current conversion data 126 (step 110).
Further, the data merge unit 113 deletes the HTML document registered in the deletion list from the current conversion data 126 (step 111).

FIG. 9 is a diagram schematically showing the flow of processing executed in the case of the second and subsequent HTML conversions.
As shown in FIG. 9, in the case of the second and subsequent HTML conversions, a new hash value is calculated for all the input new intermediate XML documents 121N, and the calculated new hash value is saved in the new hash value list 122N. To.
After that, the comparison process between the new hash value list 122N for the new intermediate XML document 121N and the old hash value list 122O for the old intermediate XML document 121O is executed, and the difference list and the deletion list are generated. Also, based on the generated difference list and deletion list, the HTML document is generated only for the changed part.

<Effect of Embodiment 1>
In the method described in this embodiment, a new hash value is calculated for each new intermediate XML document 121N, and a change is detected in the new intermediate XML document 121N by comparing the new hash value list 122N with the old hash value list 122O. As long as the HTML conversion is performed.
Therefore, according to the present embodiment, the time required for the HTML document to be generated is compared with the conventional method in which all the new intermediate XML documents 121N are processed for HTML conversion regardless of whether or not they are changed. Can be shortened.
Further, according to the present embodiment, it is possible to use the information processing apparatus 100 having less resources for the second and subsequent HTML conversions.

<Embodiment 2>
In the case of the first embodiment described above, the case where the new intermediate XML document 121N to be processed for HTML conversion is stored in the storage device 102 has been described, but in the present embodiment, the XML document is stored through the program processing. A case where a new intermediate XML document 121N is generated from the above will be described.
FIG. 10 is a diagram illustrating an example of a software configuration of the information processing apparatus 100 according to the second embodiment.
In FIG. 10, a reference numeral corresponding to a portion corresponding to that in FIG. 3 is attached. The software configuration shown in FIG. 10 is realized through the execution of a program by the signal processing unit 101.

As can be seen by comparing FIGS. 10 and 3, the signal processing unit 101 in the present embodiment has a function for generating the new intermediate XML document 121N, and the signal processing unit 101 in the first embodiment ( It is different from Fig. 3).
That is, the signal processing unit 101 according to the present embodiment has a conversion data determination unit 131 that extracts a path expression from the style sheet 123 to generate a conversion path table 132, and a new intermediate XML from the XML document 130 and the conversion path table 132. It further has an intermediate XML document generation unit 133 that generates the document 121N.
Here, the path expression is an example of information for specifying the position of an element.

<Processing operation>
Subsequently, the processing operation executed by the information processing apparatus 100 according to the present embodiment will be described.
FIG. 11 is a flowchart illustrating an example of a processing operation executed by the signal processing unit 101 constituting the information processing apparatus 100.
FIG. 11 is shown with reference numerals corresponding to the portions corresponding to those in FIG. 7. The difference between the flowchart shown in FIG. 11 and the flowchart shown in FIG. 7 is that steps 201 and 202 are executed instead of step 101 (FIG. 7).

Hereinafter, the differences between step 201 and step 202 will be described.
In step 201, the conversion data determination unit 131 (see FIG. 10) extracts a path expression (for example, an XPath expression) from the style sheet 123, and registers the value included in the path expression in the conversion path table 132.
The style sheet 123 is prepared for each HTML document. Therefore, the conversion data determination unit 131 extracts the path expression for each style sheet 123.

FIG. 12 is a diagram illustrating a pass-type extraction process by the conversion data determination unit 131.
In the case of FIG. 12, there are three style sheets 123 corresponding to HTML documents # 1 to # 3. In the figure, it is shown by style sheets # 1 to # 3.
FIG. 12 shows a part of the style sheet # 1, and "select =" / INDEX / @ NODETITLE "" and "match =" / INDEX "" are extracted as path expressions.
In the conversion path table 132, the values included in the path expression, that is, "/ INDEX / @ NODETITLE" and "/ INDEX" are stored in a state of being associated with the corresponding HTML document.

FIG. 13 is a diagram illustrating the generation process of the intermediate XML document 121 by the intermediate XML document generation unit 133 (see FIG. 10).
FIG. 13 shows an example of generating an intermediate XML document # 1 corresponding to the HTML document # 1.
Here, the intermediate XML document generation unit 133 refers to the conversion path table 132, and describes the values “/ INDEX / @ NODETITLE” and “/ INDEX” corresponding to the HTML document # 1 in the XML document 130. Extract and generate intermediate XML document # 1.
The description extracted here is an example of the path information related to HTML document # 1 in the XML document 130.
The intermediate XML document # 2 corresponding to the HTML document # 2 and the intermediate XML document # 3 corresponding to the HTML document # 3 are also generated by the same procedure.

Hereinafter, the processing operations of the conversion data determination unit 131 (see FIG. 10) and the intermediate XML document generation unit 133 (see FIG. 10) will be described using a more specific document.
FIG. 14 is a diagram illustrating a relationship between a specific example of the style sheet 123 and the values stored in the conversion path table 132.
The style sheet 123 in FIG. 14 is an example of a style sheet (fig_index.xsl) for a figure table of contents HTML document.
In the case of FIG. 14, "H3", "TITLE", and "FIG" are extracted from the style sheet 123. In the figure, "H3", "TITLE", and "FIG" are shown in bold letters.

Returning to the description of FIG.
In step 202, the intermediate XML document generation unit 133 (see FIG. 10) refers to the conversion path table 132 and generates the intermediate XML document 121 for each HTML document from the XML document 130 designated as the conversion target. Specifically, the intermediate XML document generation unit 133 deletes data that does not match the path formula from the XML document 130, and generates the intermediate XML document 121.

FIG. 15 is a diagram illustrating the relationship between the XML document 130 and the generated intermediate XML document 121.
The XML document 130 in FIG. 15 is a description part related to the HTML document of the figure table of contents, and the description part related to “H3 / TITLE” and “H3 // FIG / TITLE” is extracted from the XML document 130 in the middle. XML document 121. In FIG. 15, the extracted portion is surrounded by a thick line.

In this case, consider the case where the XML document 130 is modified.
FIG. 16 is a diagram illustrating an example of generating an intermediate XML document 121 when information not used in an HTML document is added to a part of the XML document 130 illustrated in FIG. 15.
In the example of the XML document 130 shown in FIG. 16, "Handle an image" is changed to "An image can be inserted" in the portion surrounded by a thick line.
However, this sentence "an image can be inserted" is information that does not affect the HTML document generated by the style sheet 123.
Therefore, the content of the intermediate XML document 121 generated based on the conversion path table 132 generated using the style sheet 123 is the same as the content of the intermediate XML document 121 before modification (FIG. 15).

Therefore, about the new hash value calculated for the new intermediate XML document 121N generated for the XML document 130 after the modification "The image can be inserted" and the XML document 130 before the modification. It matches the old hash value calculated for the generated old intermediate XML document 121O.
Therefore, the change presence / absence determination unit 111 does not register the name of the HTML document corresponding to the new intermediate XML document 121N (that is, the HTML document in the table of contents) in the difference list. As a result, this new intermediate XML document 121N is excluded from the target of HTML conversion by the document conversion unit 112.

Hereinafter, a specific example will be described in which the new hash value corresponding to the new intermediate XML document 121N and the old hash value corresponding to the old intermediate XML document 121O are different from each other.
FIG. 17 is a diagram showing a specific example of two intermediate XML documents 121, old and new, when a modification such as adding new information to an HTML document is added to the XML document 130. (A) is a specific example of the new intermediate XML document 121N, and (B) is a specific example of the old intermediate XML document 121O.
The description enclosed in a thick frame in the new intermediate XML document 121N is an additional part. The modification includes not only the addition of the description but also the deletion.
In any case, since the content of the new intermediate XML document 121N is different from that of the old intermediate XML document 121O, it is subject to HTML conversion by the document conversion unit 112.

FIG. 18 is a diagram illustrating a case where a description for a new HTML document is added to the XML document 130. (A) is a specific example of the new intermediate XML document 121N, and (B) is a specific example of the old intermediate XML document 121O.
In this case, as shown in FIG. 18, the data of the old intermediate XML document 121O does not exist. Therefore, the new intermediate XML document 121N is subject to HTML conversion by the document conversion unit 112.

FIG. 19 is a diagram illustrating a case where the description corresponding to the existing HTML document is deleted from the XML document 130. (A) is a specific example of the new intermediate XML document 121N, and (B) is a specific example of the old intermediate XML document 121O.
In this case, as shown in FIG. 19, there is no data of the new intermediate XML document 121N corresponding to the old intermediate XML document 121O. Since this is confirmed by the deletion list, the data merging unit 113 deletes the corresponding HTML document from the merged HTML documents.

<Effect of Embodiment 2>
According to this embodiment, it is not necessary to manually prepare the intermediate XML document 121 in advance, and if the XML document 130 edited by the operator and the style sheet 123 corresponding to each HTML document are provided to the information processing apparatus 100. , The corresponding HTML document can be generated by the signal processing of the information processing apparatus 100.
Therefore, in the case of the present embodiment, the time required for the HTML document to be generated can be shortened as compared with the case of the first embodiment.

<Other embodiments>
Although the embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. It is clear from the description of the claims that the above-described embodiment with various modifications or improvements is also included in the technical scope of the present invention.
For example, in the above-described embodiment, the case of converting an XML document, which is an example of a structured document, into an HTML document has been described, but it can also be used for conversion processing of other structured documents. For example, it can be used for structural conversion of a document described in SGML (Standard Generalized Markup Language), a document described in XHTML (Extensible HyperText Markup Language), a document described in MathML (Mathematical Markup Language), and the like.

1 ... Web system, 10 ... Server system, 20 ... Terminal device, 25 ... Browser screen, 100 ... Information processing device, 110 ... Document reading unit, 111 ... Change presence / absence determination unit, 112 ... Document conversion unit, 113 ... Data merging unit , 121, 121N, 121O ... Intermediate XML document, 122122N, 122O ... Hash value list, 123 ... Style sheet, 123A ... Text HTML document style sheet, 123B ... Table of contents HTML document style sheet, 123C ... Figure HTML document style sheet , 124 ... Difference conversion data, 125 ... Previous conversion data, 126 ... Current conversion data, 130 ... XML document, 131 ... Conversion data determination unit, 132 ... Conversion path table, 133 ... Intermediate XML document generation unit

Claims (7)

On the computer
An intermediate document that is a plurality of partial data constituting the first structured document that is the conversion source and does not include information that is not referred to by the rules used for conversion of the representation format of the partial data is read from the storage unit, and the intermediate document is read. A function to convert a document into a second structured document based on the above rules, and
Prior to the conversion to the second structured document, the first hash value is calculated for the intermediate document for which the current conversion to the second structured document is the second and subsequent times, and the intermediate with the same name. A function of reading the second hash value calculated at the time of the previous conversion of the document from the storage unit and comparing the first hash value with the second hash value .
When the first hash value is different from the second hash value , the intermediate document corresponding to the first hash value is converted into a new second structured document, and the new second structure is obtained. A function to replace the corresponding existing second structured document stored in the storage unit by the converted document, and
A program to execute. Each time the first hash value is calculated, a list is generated in which the calculated first hash value is associated with the information that identifies the second structured document corresponding to the first hash value. Further has a function of storing in the storage unit .
The program according to claim 1 , wherein the first hash value stored in the list is used as the second hash value at the next conversion of the intermediate document . If the name corresponding to the new intermediate document does not exist in the existing list, the new intermediate document is converted to the second structured document and the first calculated for the new intermediate document. The program according to claim 2, further comprising a function of adding a hash value and information identifying the second structured document to the list. If the existing name in the list does not exist in the new list generated for the new intermediate document, the name is added to the deletion list and the second structured document corresponding to the name is deleted. The program according to claim 2 , further comprising a function of performing. The program according to claim 1, further comprising a function of extracting the information referred to in the rule from the first structured document to generate the intermediate document. The program of claim 5, wherein the intermediate document is generated in units of the second structured document that is converted using the rule. An intermediate document that is a plurality of partial data constituting the first structured document that is the conversion source and does not include information that is not referred to by the rules used for conversion of the representation format of the partial data is read from the storage unit, and the intermediate document is read. A conversion unit that converts a document into a second structured document based on the above rules, and
Prior to the conversion to the second structured document, the first hash value is calculated for the intermediate document for which the current conversion to the second structured document is the second and subsequent times, and the intermediate with the same name. A comparison unit that reads the second hash value calculated at the time of the previous conversion of the document from the storage unit and compares the first hash value with the second hash value .
When the first hash value is different from the second hash value , the intermediate document corresponding to the first hash value is converted into a new second structured document, and the new second structure is obtained. A replacement unit that replaces the corresponding existing second structured document stored in the storage unit by the converted document.
Information processing device with.

Images