WO2009000141A1

WO2009000141A1 - Representation method, system and device of layout file logical structure information

Info

Publication number: WO2009000141A1
Application number: PCT/CN2008/000910
Authority: WO
Inventors: Jing Qu; Zhensheng He; Yi Wang; Li Zhang
Original assignee: Peking University Founder Group Co., Ltd.; Beijing Founder Apabi Technology Ltd.; Peking University
Priority date: 2007-06-22
Filing date: 2008-05-08
Publication date: 2008-12-31
Also published as: CN101271463B; CN101271463A

Abstract

A representation method, system and device are disclosed, relating to the information representation method and system in the computer information process technique. The invention is to solve the prior layout file's problems of being not flexible and not easy to add or modify. By obtaining the logical structure information and content reference sequence of a layout file; dividing said content reference sequence into multiple content reference sub-sequences according to said logical structure information, and creating content dividing description file; creating logical unit description file according to said logical structure information; associating said content dividing description file to logical unit description file, it is effective and flexible to represent the logical structure information of layout file, and there is no need to modify the original layout file and any content in the layout file can be separately described in logical structure information, extracted and reused in different document logical structure modules.

Description

Method, system and device for expressing logical structure information of layout file

The present invention relates to a method and system for representing structural information of a computer electronic document, and more particularly to a method, system and apparatus for representing logical structure information of a layout file. Background technique

The layout file technology converts the original format of the original format of various formats into a unified format, and truly maintains the layout and information of the text, graphics, formulas and colors in the original file in the conversion, and realizes in different terminal devices and reading. The software has consistent display results. The layout file adopts an absolute description method. In the customized coordinate system, the position and size of each primitive (such as characters, pictures, tables, etc.) are clearly recorded, so that the printed results of the document and The results of browsing on the computer are consistent, and display consistency is achieved in any computer environment (such as Windows system or operating system of a PDA, a smart phone, etc.) to ensure that the original appearance of the document is truly reproduced.

The current layout file formats mainly include PDF (Portable Document Format) from Adobe, XPS (Xml Paper Specification) from Microsoft Corporation, and CEB (Chinese e-Paper Basic) from Beijing Founder Apabi Technology Co., Ltd. Electronic files in other formats (such as WPS, Microsoft Word, etc.) can also be easily converted into layout files.

Due to the relative stability of the layout files, it is very suitable as the final release and dissemination form of electronic documents. It is widely used in electronic documents, e-books, electronic journals, electronic papers, etc., but due to the absolute description of local information in the layout files (absolute description It means that the display position of the text in the layout file is specified relative to the coordinates of the layout file, regardless of the logical order of the text, which makes it unfavorable for editing. After modifying the content of the document, it is necessary to recalculate the layout and rewrite the entire document. The layout information, so the retrieval of the layout file content, structured storage, modification and other editing operations will be very troublesome. At the same time, there are more types of clients, such as PDAs and smart phones. Users are required to easily read layout files on a variety of clients. This requires the client to break through the limitations of the layout file display, depending on the size of the display device screen. The content of the layout file is re-typed, You can read the contents of a document continuously without dragging horizontal or vertical scroll bars. These applications require the logical structure information of the document in the layout file. The logical structure information of the document refers to: According to a certain understanding, the logical meaning of each part of the document, and the relationship between the parts, such as the title of the document, Hierarchical information on the content of documents such as text, paragraphs, and tables.

The logical structure information of the document includes the logical unit of the document and the hierarchical relationship between the logical units, wherein each document logical unit corresponds to a certain part of the document, the logical unit is an abstract concept that humans can understand, and the relationship between the logical units represents A logical combination of these concepts, as shown in Figure 1, the comic unit of an article may have a title, author, abstract, body, etc. These logics also form a tree structure, and these logical units are Corresponds to one or more text blocks.

This type of logical structure information is not included in a large number of layout files. However, Adobe's Tagged PDF technology represents the logical structure information of the document in the layout file. It uses the method of adding special symbols in the content description instruction stream of the layout file to divide the logical unit, as shown in Figure 2, in the content data stream. Tag tags are added to them, and Tag... and End Tag are used to represent a logical unit. This method has various drawbacks in practical applications: First, modify, add, and delete the logical structure of the document. The information requires modification of the content instruction stream of the layout file. This modification process is complicated and error-prone. Secondly, the granularity of the instruction stream partitioning (a granularity can be considered as a logical unit) is limited. The minimum granularity is the entire content of an output instruction, and there may be cases where a certain content fragment cannot be further divided.

For the current large number of layout files that do not contain the logical structure information of the document, the application requires adding the logical structure information of the document to these layout files, and the layout file containing the logical structure information of the document is inflexible and inconvenient to add and modify the logical structure information. Layout files, which can not meet the needs of users, designing a representation of the logical structure information of a document in a layout file is of great value to the practical application of the layout file. Summary of the invention

Embodiments of the present invention provide a method, system, and apparatus for representing logical structure information of a layout file. It is used to solve the problem that the layout file in the prior art is inflexible to the logical structure information processing, is inconvenient to add and modify the layout file, and cannot meet the user's needs.

An embodiment of the present invention provides a method for expressing logical structure information of a layout file, including the following steps:

Obtaining logical structure information and content reference sequence of the layout file;

And dividing the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, and generating a content division description file;

Generating a logical unit description file according to the logical structure information;

Associate the content partitioning description file with the logical unit description file.

The step of obtaining the logical structure information of the layout file includes:

Use a computer application to annotate the layout file or to obtain logical structure information for the layout file based on the document analysis and document understanding processing system.

The steps of obtaining the content reference sequence of the layout file include:

The content of the layout file is read, and the content reference sequence is generated according to the order in which the primitives in the content of the layout file appear in the content data stream or the traversal order of the document tree.

The steps of dividing the content reference sequence into a plurality of content reference subsequences include:

The content reference sequence is divided into a plurality of content reference sub-sequences according to the primitives in the contents of the layout file at the offset position of the content reference sequence or the primitive symbols in the content reference sequence.

And assigning a number to each of the plurality of content reference subsequences.

The step of associating the content division description file with the logical unit description file includes: associating the content division description file with the comic unit description file by the number of the content reference subsequence.

The content division description file or the logical unit description file is a data block in a separate file or a layout file on the storage device.

The content partitioning description file or logical unit description is described in a structured markup language.

An embodiment of the present invention further provides a system for expressing logical structure information of a layout file, including: a logical structure information obtaining system, configured to obtain logical structure information of the layout file; a logical structure description generating module, configured to acquire a content reference sequence, and divide the content reference sequence into a plurality of content reference indexes according to the logical structure information a sequence, generating a content partitioning file and a unit description file;

The logical structure description parsing module is configured to parse and associate the content partitioning description file and the logical unit description file.

The foregoing logical structure description generating module includes:

a content reference sequence generating module, configured to read a layout file content, and generate a content reference sequence; a content division description generation module, configured to divide the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, and generate Content division description file;

The logical unit description generation module generates a logical unit description file according to the logical structure information. The foregoing logical structure description generating module further includes: a storage device, configured to store a content reference sequence generated by the content reference sequence generating module, or a plurality of content reference sub-sequences divided by the content partitioning description generating module.

When the content reference sequence and the content reference subsequence are not saved in the storage device, the foregoing logical structure description parsing module further includes:

a content reference sequence generating module, configured to read the layout file content, and generate a content reference sequence; the content partitioning parsing module is configured to divide the content reference sequence into a plurality of content reference sub-sequences, and generate a content division description file.

The above logical structure description parsing module further includes:

The logical unit description parsing module is configured to read and parse the data in the logical unit description file;

And a mapping module, configured to associate the content division description file with the logical unit description file.

An embodiment of the present invention provides a device for displaying logical structure information of a layout file, including: a logical structure information acquiring module, configured to obtain logical structure information of a layout file;

a logical structure description generating module, configured to acquire a content reference sequence, and according to the logical structure Decoding the content reference sequence into a plurality of content reference sub-sequences, and generating a content division description file according to the plurality of content reference sub-sequences; generating a logical unit description file according to the logical structure information;

The above technical solution divides the content reference sequence of the layout file into a plurality of content reference sub-sequences, generates a corresponding content division description file, and generates a logical unit description file, and then associates the content division description file with the logical unit description file. , the logical structure information and the layout file are separated from each other, and any content in the layout file can be separately described and extracted, and can be described according to different document logical structure models, the description range is more accurate, and the logical structure information is represented. It is more flexible, and can also add multiple document logical structure information descriptions to the same layout file. When adding or modifying the logical structure information of the document, it is not necessary to modify the content description of the layout file, thereby reducing the possibility of error, and This flexible representation of the logical structure information of the layout file can describe a large number of existing layout files without affecting the existing system, improving compatibility. DRAWINGS

Figure 1 is a schematic diagram showing the structure of the structure information of the existing layout file;

2 is a schematic diagram showing the structure of the logical structure information of the document in the layout file by the existing Adobe Tagged PDF technology;

FIG. 3 is a schematic diagram of a method for representing logical structure information of a layout file according to an embodiment of the present invention; FIG. 4 is a schematic diagram of relationship between logical structure information and a layout file of a layout file according to an embodiment of the present invention; FIG. 5 is a layout file according to an embodiment of the present invention; Schematic diagram of the reference sequence with its content;

6 is a schematic diagram showing the structure of an offset position of the content reference sequence shown in FIG. 5;

7 is a content division description file according to the content of the layout file document shown in FIG. 5; FIG. 8 is a divisional description file according to another content of the layout file content shown in FIG. 5; FIG. 9 is a diagram according to FIG. Or a logical unit description file of the layout file shown in FIG. 8; 10 is another block description file according to the layout file shown in FIG. 6, FIG. 7, or FIG. 8. FIG. 11 is another logical unit description file according to the layout file shown in FIG. 6, FIG. 7, or FIG. 8. FIG. A schematic structural diagram of a logical structure information representation system of a layout file provided by an embodiment of the present invention;

13 is a schematic structural diagram of a logic structure description generation module in a logical structure information representation system of a layout file according to an embodiment of the present invention;

FIG. 14 is a schematic structural diagram of a logical structure description parsing module in a logical structure information representation system of a layout file according to an embodiment of the present invention. detailed description

The technical solution of the present invention is described below in conjunction with specific embodiments:

As shown in FIG. 3, the method for representing the logical structure information of the layout file includes the following steps: Step 31: Obtain logical structure information and a content reference sequence of the layout file;

Step 32: Divide the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, and generate a content division description file;

Step 33: Generate a logical unit description file according to the logical structure information;

Step 34: Associate the content division description file with a logical unit description file. Corresponding content division description file, and generating a logical unit description file, and then associating the content division description file with the logical unit description file, so that the logical structure information and the layout file are separated from each other, and any content in the layout file can be separately performed. Logical structure description, extraction, and description according to different document logical structure models, the description range is more accurate, the logical structure information representation is more flexible, and at the same time, multiple document logical structure information descriptions can be added to the same layout file, Or modify the logical structure information of the document, it is not necessary to modify the content description of the layout file, which reduces the possibility of error, and the flexible representation of the logical structure information of the layout file can describe a large number of existing layout files. Improve compatibility without affecting existing systems. Wherein, in the above step 31, the logical file information of the layout file may be obtained by using the computer application to mark the layout file or the document analysis and the document understanding processing system by analyzing the electronic document that already contains the logical structure information.

For example, for an electronic document corresponding to a layout file that already contains logical structure information, such as HTML, Microsoft Word, the document processing system of the document can be utilized to extract logical structure information therein, such as for Microsoft Word documents. Office automation objects to get logical structure information. In addition, the user can mark the logical unit of the layout file through a computer application with a graphical interface. It is also possible to obtain its logical structure information through a processing system based on document analysis and document understanding.

In the foregoing step 31, the content of the layout file may be read first, and then the content reference is generated according to the order in which the primitives (such as characters, pictures, tables, etc.) in the content of the layout file appear in the content data stream or the traversal order of the document tree. sequence. A content reference sequence is a collection of multiple ordered meta-information information in a layout file. The layout file 43 shown in FIG. 4, the CEB file Sample.ceb, generates a logical unit description file 41 and a content division description file 42 according to the logical structure information acquired above. In this embodiment, the layout file is described in an XML language. The logical unit in 43 and the relationship between each logical unit, such as Document_structure.xml; also describe the content partitioning in XML language, such as Piece.xml. The logical unit description file 41 and the content division description file 42 herein may also be described by other structured markup languages, such as the SGML language.

In the foregoing step 32, the content reference sequence may be divided into multiple content reference sub-sequences according to the offset position of the content reference sequence in the content of the content file or the primitive symbol in the content reference sequence, and Each of the content reference subsequences is assigned a number. This number can be saved in the content partitioning description file.

As shown in FIG. 5, FIG. 6, FIG. 7, and FIG. 8, a layout file such as 51 has a document content data stream description 52, which contains text primitives. Figure 6 is a specific embodiment of the logical structure in accordance with the layout file 51 of Figure 5. Wherein 61 is a content reference sequence of the layout file, and the content reference sequence is arranged according to the order in which the primitives appear in the content description 52. 62 represents the offset position of the primitive in the content reference sequence. 71 or 81 is a content division description file, the description The file is divided by specifying the starting offset position of the content reference subsequence in the content reference sequence and the length of the subsequence. Each division is given a unique number PID, as shown in Figure 7, number 8 corresponds to "before the bed, moonlight," subsequence, number 9 corresponds to "suspicious ground frost, head to see the moon,,, subsequence. In actual In the application, the two content division description files shown in FIG. 7 and FIG. 8 can exist at the same time.

91, 101 or 111 in Fig. 9, Fig. 10, Fig. 11 are comma element description files in XML language, and the logical unit can be associated with the content reference subsequence through the PID of the content reference subsequence. <line="9,, /> in Figure 9 is a logical unit, <line="8,, /> is a logical unit. It can also be seen from the figure that the preamble of the file 91 is described in terms of logical units. In the order of traversal, the corresponding document content order will be the reading order of the layout file 51 in FIG. Although the content shown in Figure 5 depicts the data stream 52 not being output in the reading order.

The logical unit description file in the above step 33 includes: a logical unit of the layout file and a relationship between the logical units. As shown in Figure 9, Figure 10, Figure 11. Structured description languages can be used to describe logical units and their relationships, such as XML, SGML, and the relationship between logical units can reflect the reading order of layout files.

In the above step 34, the content division description file may be associated with the logical unit description file by the number given above for the content reference subsequence. In particular, the logical unit and its corresponding content reference subsequence can be associated by the number of the content reference subsequence. For example, by the number 8 in FIG. 9 corresponding to the offset address 113 in FIG. 7, the offset address 113 corresponds to the content reference sub-sequence "before the moonlight" in FIG. 6, that is, the logical unit <line=" by the number 8. The 8"/> is associated with the "Before the Moon" content reference subsequence. The content division description file or the logical unit description file in the above embodiment may be a separate file on the storage device, so that the logical structure information and the layout file are separated from each other, and the representation of the logical structure information is more flexible.

Of course, the content division description file or the logical unit description file in the above embodiment may also be a data block in the layout file.

As shown in FIG. 12, in accordance with the method for representing the logical structure information of the layout file, the embodiment of the present invention further provides a system for expressing the logical structure information of the layout file, including: a logical structure information acquiring system, configured to obtain logical structure information of the layout file; a logical structure description generating module, configured to obtain a content reference sequence from the layout file parsing system, and divide the content reference sequence obtained by the logical reference information into multiple Content reference subsequences, generating a content division description file and a logical unit description file;

As shown in FIG. 13, the logical structure description generating module in FIG. 12 above includes:

a content reference sequence generating module, configured to read the content of the layout file, and generate a content reference sequence in a specified order; the specified order may be a sequence in which the primitives in the content of the layout file appear in the content data stream, or may be a traversal of the document tree order.

a content division description generating module, configured to divide the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, and generate a content division description file; the division manner may be in accordance with a primitive in the content of the layout file The content references the offset position of the sequence or the primitive symbol in the content reference sequence, and assigns a number to each content reference subsequence; the number can be saved in the content division description file.

a logical unit description generating module, configured to generate a unit description file according to the logical structure information, where the logical unit description file includes a plurality of logical units and a relationship between the logical units, and the logical description unit may be used to describe the logical unit And the relationship between them, such as the use of XML, SGML language, and the relationship between the units can reflect the reading order of the layout files.

The foregoing logical structure description generating module may further include: a storage device, configured to store a content reference sequence generated by the content reference sequence generating module, or a plurality of content reference sub-sequences divided by the content partitioning description generating module, or generated by the logic unit description generating module Logical unit description file. The above content reference sequence and content reference subsequence may or may not be stored in the storage device.

As shown in FIG. 14, the logical structure description parsing module in FIG. 12 above includes:

The logic unit describes a parsing module, configured to read and parse data in the logical unit description file, and a mapping module, configured to associate the content partitioning description file with the logical unit description file. Specifically, the unit can be edited according to the number of the content reference subsequence and its corresponding The reference subsequence is closed.

When the logical structure describes the content reference sequence generated by the content reference sequence generating module in the generating module, or the plurality of content reference sub-sequences generated by the content partitioning description generating module are not saved in the storage device, the logical structure description parsing module should also Includes the following modules:

a content reference sequence generating module, configured to read a layout file content, and generate a content reference sequence; a content division description parsing module, configured to divide the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, and generate Content division description file.

When the content reference sequence in the above-mentioned logical structure description generation module, or a plurality of content reference sub-sequences, have been saved in the above storage device, they can be directly read without being generated again.

In an actual application, a content reference sequence generation module, a content division description parsing module, a content re-generating content reference sequence and a content division description file are used, and a large number of content reference sequences and content division description file data are read from the memory. The way, the operation speed is fast and the efficiency is high.

The working process of the processing system for logical structure information of the layout file of the present invention will be described below with reference to FIG. 13 and FIG. 14 :

As shown in Figure 13, the logical structure description generation module works as follows:

The logical structure information acquisition system obtains the logical structure information of the layout file. For the electronic document corresponding to the layout file, including the logical structure information, such as HTML, Microsoft Word, the document processing system of the document can be utilized to extract the logical structure information, for example, the Microsoft Word document can utilize Office. Automate objects to get logical structure information. In addition, the user can mark the logical unit of the layout file through a computer application with a graphical interface. It is also possible to obtain its logical structure information through a processing system based on document analysis and document understanding.

The content reference sequence generation module uses the layout file parsing system to arrange the contents of the layout file into an ordered sequence according to a certain order, and obtain a content reference sequence of the layout file.

The content division description generation module divides the content reference sequence according to the logical structure information obtained in the above-mentioned logical structure information acquisition system, and outputs a content division description file.

The logic unit description generation module acquires the logic node obtained in the system according to the above logical structure information The information output logical unit description file.

The content partitioning description file and the logical unit description file can be embedded in the layout file or saved separately.

As shown in Figure 14, the logical structure description parsing module works as follows:

In the case where the content reference sequence, the content reference subsequence (which may also be considered as the content division description file), and the logical unit description file are not saved, the content reference sequence generation module is required to reuse the layout file parsing system to set the inner oblique data of the layout file. The order is arranged as an ordered sequence, resulting in a content reference sequence.

The content division description parsing module reads the content division description file, and divides the content reference sequence obtained in the logic structure description generation module shown in FIG. 13 above.

The logical unit description parsing module reads the logical unit description file in the logical structure description generating module shown in Fig. 13 above and verifies its validity.

The mapping module associates the logical unit with the content reference subsequence according to the content reference sub-sequence number in the content partition description file and the logical unit description file.

As a further illustration of a system for processing logical structure information in a layout file, an external system interacting with the system may have a layout file resolution system, a logical structure information acquisition system, and other document processing systems. Other document processing systems may be format conversion systems, layout rearrangements, and the like. These systems use logical structure information to process layout files, such as extracting information, rearranging pages, converting to other formats, and so on.

In addition, the content division description file and the logical unit description file described above may be saved in the layout document or may be separately saved as a separate file from the layout file. For the same layout file, you can have multiple logical structure information descriptions.

The embodiment of the present invention further provides a device for expressing logical structure information of a layout file, where the device includes a logical structure information acquiring module, a logical structure description generating module, and a logical structure description parsing module, where:

a logical structure information obtaining module, configured to obtain logical structure information of the layout file;

a logical structure description generating module, configured to acquire a content reference sequence, and according to the logical structure The information is divided into a plurality of content reference sub-sequences, and a content division description file is generated according to the plurality of content reference sub-sequences; and a re-synthesis unit description file is generated according to the logical structure information;

The logical structure description parsing module is configured to parse and associate the content partitioning file and the logical unit description file.

Still referring to FIG. 13, the logical structure description generation module includes a content reference sequence generation module, a content division description generation module, and a logic unit description generation module, where:

a logic unit description generating module, configured to generate a logical unit description file according to the logical structure information, where the logical unit description file includes a plurality of logical units and a relationship between the logical units, and the structured description language may be used to describe the logic Units and their relationships, such as XML, SGML language, and the relationship between logical units can reflect the reading order of the layout files.

Still referring to FIG. 14, the logical structure description parsing module includes a logical unit description parsing module and a mapping module, where:

a logic unit description parsing module, configured to read and parse data in the logic unit description file; a mapping module, configured to perform the content division description file and the logic unit description file Association. In particular, the logical unit and its corresponding content reference subsequence may be associated by the number of the content reference subsequence.

a content reference sequence generating module, configured to read the content of the layout file, to generate a content reference sequence, and a content division description parsing module, configured to divide the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, And generate a content division description file.

When the above logical structure describes the content reference sequence in the generation module, or the plurality of content reference sub-sequences have been saved in the storage device, they can be directly read without being generated again.

In summary, the method and system of the present invention divides a content reference sequence of a layout file into a plurality of content reference sub-sequences, generates a corresponding content division description file, and generates a logical unit description file, and then divides the content. The description file is associated with the logical unit description file, so that the logical structure information and the layout file are separated from each other, and any content in the layout file can be separately described and extracted, and can be described according to different document logical structure models. The description range is more accurate, the representation of logical structure information is more flexible, and multiple logical structure information descriptions can be added to the same layout file, that is, the same layout file can have multiple content division description files and logical unit description files, and is added. Or modify the logical structure information of the document, do not need to modify the content description of the layout file, reduce the possibility of error, and the flexible representation of the logical structure information of the layout file can be performed on a large number of existing layout files. Described later, without affecting the existing system to improve the compatibility. The spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of the inventions

Claims

Rights request

A method for representing logical structure information of a layout file, comprising the steps of: acquiring logical structure information and a content reference sequence of a layout file;

And dividing the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, and generating a content division description file according to the plurality of content reference sub-sequences;

The content partitioning description file is associated with the logical unit description file.

2. The method for representing logical structure information of a layout file according to claim 1, wherein the step of obtaining logical structure information of the layout file comprises:

3. The method for representing logical structure information of a layout file according to claim 1, wherein the step of obtaining a content reference sequence of the layout file comprises:

4. The method for representing layout file structure information according to claim 1, wherein the step of dividing the content reference sequence into a plurality of content reference subsequences comprises:

The content reference sequence is divided into a plurality of content reference sub-sequences according to the primitives in the content of the layout file at the offset position of the content reference sequence or the primitive symbols in the content reference sequence.

The method for expressing logical structure information of the layout file according to claim 1, wherein the method further comprises: assigning a number to the plurality of content reference subsequences; and dividing the content into description files and logic The step of associating the unit description file includes: associating the content division description file with the logic unit description file by the number of the content reference subsequence.

The method for expressing logical structure information of a layout file according to claim 1, wherein the content division description file or the logical unit description file is a data file in a separate file or a layout file on the storage device.

7. The method for representing logical structure information of a layout file according to claim 1, wherein The content partitioning description file or the logical unit description file is described in a structured markup language.

8. A layout file structure system representation system, comprising: a logic structure information acquisition system, configured to obtain logical structure information of a layout file;

a logical structure description generating module, configured to obtain a content reference sequence, and divide the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, to generate a content division description according to the plurality of content reference sub-sequences a file; generating a logical unit description file according to the logical structure information;

The logical structure description parsing module is configured to parse and associate the content division description file and the ill unit description file.

The system for expressing logical structure information of the layout file according to claim 8, wherein the logical structure description generating module comprises:

a content reference sequence generating module, configured to read a layout file content, and generate a content reference sequence; a content division description generation module, configured to divide the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, and according to the Generating a content division description file by the plurality of content reference sub-sequences;

The logical unit description generation module generates a logical unit description file according to the logical structure information.

The system for expressing the structure information of the layout file according to claim 9, wherein the logic structure description generation module further comprises: a storage device, configured to store a content reference generated by the content reference sequence generation module The sequence, or the content partitioning, describes a plurality of content reference subsequences that are generated by the generation module.

11. The system for expressing logical structure information of a layout file according to claim 8, wherein the logical structure description parsing module comprises:

a content reference sequence generating module, configured to read the layout file content, and generate a content reference sequence; the content division description parsing module is configured to divide the content reference sequence into a plurality of content reference sub-sequences, and generate a content division description file.

The system for expressing the logical structure information of the layout file according to claim 10 or 11, wherein the logical structure description parsing module further comprises:

a logical unit description parsing module, configured to read and parse the number in the logical unit description file According to;

A device for displaying logical structure information of a layout file, comprising: a logical structure information acquiring module, configured to obtain logical structure information of a layout file;

a logical structure description generating module, configured to obtain a content reference sequence, and divide the content reference sequence into a plurality of content reference sub-sequences according to the logical structure information, to generate a content division description according to the multiple content reference sub-sequences a file; generating a logical unit description file according to the i-series structure information;