EP1344151A1 - Procede pour diviser des documents structures en plusieurs parties - Google Patents
Procede pour diviser des documents structures en plusieurs partiesInfo
- Publication number
- EP1344151A1 EP1344151A1 EP01271587A EP01271587A EP1344151A1 EP 1344151 A1 EP1344151 A1 EP 1344151A1 EP 01271587 A EP01271587 A EP 01271587A EP 01271587 A EP01271587 A EP 01271587A EP 1344151 A1 EP1344151 A1 EP 1344151A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- information
- document
- main
- transmitted
- secondary part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/958—Organisation or management of web site content, e.g. publishing, maintaining pages or automatic linking
- G06F16/986—Document structures and storage, e.g. HTML extensions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S707/00—Data processing: database and file management or data structures
- Y10S707/99941—Database schema or data structure
- Y10S707/99942—Manipulating data structure, e.g. compression, compaction, compilation
Definitions
- the present invention relates to a method for dividing structured documents into several parts.
- the documents thus manipulated and transmitted contain several types of information integrated into a structure.
- a structured document is a collection of sets of information, each associated with a type and attributes, and composed together according to mainly hierarchical relationships. These documents use a structuring language such as SGML, HTML, XML, making it possible in particular to distinguish the different subsets of information composing the document. In contrast, in a so-called linear document, the content information of the document is mixed with the presentation and typing information.
- a structured document includes separation marks for the different sets of information in the document.
- these marks called “tags” are of the form " ⁇ XXXX>” and " ⁇ /XXXX>", the first mark indicating the start of a set of information "XXXX” and the second the end of this set.
- a set of information can be composed of several sets of lower level information.
- a structured document presents a hierarchical or tree structure diagram, each node representing a set of information and being connected to a node of higher hierarchical level representing a set of information which contains the sets of information of lower level.
- the nodes located at the end of the branch of this tree structure represent sets of information containing data of a predefined type, which cannot be broken down into subsets of information.
- a structured document contains separation marks represented in the form of textual or binary data, these marks delimiting sets or subsets of information which may themselves contain other subsets of information delimited by marks .
- a structured document is associated with what is called a structure diagram defining in the form of rules the structure and the type of information of each set of information in the document.
- a schema is made up of nested groups of structures of information sets, these groups can be ordered sequences, groups of alternative elements or groups of necessary elements, ordered or unordered.
- a structured document when a structured document must be transmitted, it is compressed beforehand, so as to minimize the volume of data to be transmitted.
- the document structuring data are also compressed, knowing that the recipient of the document is supposed to know beforehand the structure diagram of the document and can use the structure diagram to determine every instant what set of information it will receive. It is therefore essential that the structure of the transmitted document exactly match the structure diagram that the recipient of the document plans to use for receiving and decoding the document, failing which, the recipient cannot determine the type of data transmitted, in particular. , and therefore is unable to decode them and reconstruct the original document.
- the structured documents to be transmitted tend to become more and more voluminous. It is envisaged, for example, to transmit or broadcast in this way complete descriptions of cinematographic works or television programs.
- the object of the present invention is to eliminate this drawback.
- This objective is achieved by providing a method for dividing a structured document having a hierarchical structure defined by a structure diagram, this document grouping together a main set of information including subsets of information, at least some of the information subsets which may include information subsets of lower hierarchical level, each information subset being associated with a respective type of information.
- this method comprises the steps consisting in:
- each part is understandable in itself and can be decoded, regardless of the division chosen. Furthermore, when such a part is transmitted and the transmission fails, the rest of the document remains valid and the part which is not transmitted correctly can be retransmitted without the need to retransmit the entire document. Furthermore, it is not necessary to have the main and secondary parts upstream of a part in order to be able to decode the latter, since each part is valid and understandable in itself. Thanks to these provisions, a transmitted document can be enriched and modified over time.
- the document comprises a header which is inserted into each part, this header comprising an indicator whose value indicates whether the document is complete or not.
- each part comprises a header comprising information giving the location of the part in the hierarchical structure of the document.
- Said location information of the secondary part in the hierarchical structure of the document advantageously describes a path in this structure, defining the position of the secondary part in the document.
- Said path can be defined absolutely relative to the main information set of the document. It can also be defined relatively with respect to the position of a last transmitted secondary part.
- each type of information assigned to the predefined value is followed by a reference to the secondary part containing the subset of information associated with the type of information, said information on the location of the secondary part in the hierarchical structure. of the document being the reference of said secondary part.
- This method can further comprise the transmission of several parts of the document associated with the same location in the structure.
- the last part transmitted replaces the previous one which is associated with the same location.
- the header of each part includes information specifying a method of processing the part with respect to a part associated with the same location in the structure.
- the structured document is for example of the SGML, XML or HTML type.
- FIG. 1 represents a tree structure in which each node symbolizes a set or subset of information from a structured document which is normally transmitted in one go;
- Figure 2 shows the structured document shown in Figure 1 cut into several parts, each of which can be transmitted separately according to the invention
- Figure 3 shows in more detail the structure of the information contained in a structured document
- FIG. 4 represents another tree structure illustrating a method of defining the position of a part of the structure, transmitted separately from the rest of the structure.
- FIG. 1 represents a tree structure comprising a root node 1 decomposed into three nodes of lower rank, of which the first node 1.1 is not decomposed into nodes of lower rank, the second node 1.2 consists of two nodes 1.2.1 and 1.2 .2 and the third node 1.3 consists of a single node 1.3.1.
- the two nodes 1.2.1 and 1.2.2 of the second node 1.2 are attached respectively to a 1.2.1.1 and two nodes 1.2.2.1 and 1.2.2.2 of lower rank.
- This structure represents a structured document D comprising a header H in which are defined a certain number of parameters defining the coding and representation format of the document, and a main body B gathering the information and sets of information constituting the document.
- a structured document can be transmitted in several separate parts PI, P2, P3, namely a main part and secondary parts P2, P3 which are attached to the main part ( Figure 2). Such a transmission is preferably carried out after compression in an appropriate manner of each part to be transmitted separately.
- Each part of the document whether compressed or not, includes a header H, H2, H3 and a main body B1, B2, B3.
- a main document body B comprises a data header DH and one or more data bodies DB each gathering the information from a subset of information in the document.
- the DH data header may include a field K making it possible to remove any ambiguity when decoding the document, in particular by giving a number making it possible to define the following set of information, and / or a field containing the number N d 'occurrences of the DB data body.
- each DB data body can include a T field indicating the type of information it contains, an L field giving the length of this information in number of bits or bytes, an A field gathering attributes of the information subset and a Val field containing the value or content of the information subset.
- the Val field can itself contain a DH data header field and one or more fields containing a DB data body.
- the field T containing the type of information of a body of data DB not transmitted or removed from the document receives a value predefined indicating that the following subset of information is not transmitted.
- This particular predefined value of type of information is for example chosen to be equal to 0 in the case of a document in compressed form, the values of the other types of information being different from 0. If this predefined value appears in the transmitted document, the length L field and the A and Val fields which normally follow the type of information, do not appear in the transmitted data. Consequently, following a type of information equal to the predefined value, the DH header of the next set of information is found in the document or an end of document indicator.
- Parts PI, P2 and P3 can be transmitted separately one or more times. They have for this purpose a header H, H2, H3 comprising first of all a parameter indicating that the document is not complete, followed by a definition of the location of the part transmitted in the tree structure of the complete document.
- a structured document can be enriched and modified over time.
- the transmission of the main part PI is not necessary since, thanks to the definition of the location appearing in the header of the secondary parts, the processing unit which receives the transmitted secondary parts can determine the location of the received part in the document structure and thus decode it.
- the document can be split up so that the main part does not contain any useful data, and so that the whole document can be reconstructed from the secondary parts and their location in the document structure. .
- the header H, H2, H3 of the parts PI, P2, P3 can include information specifying a method of processing the part with respect to a part already transmitted associated with the same location in the structure, namely for example, if the transmitted part must replace a part associated with the same location, which has already been transmitted, or not be taken into account if it already appears in the document received, or else be merged with the part associated with the same location, which has already been transmitted.
- this definition of location can include the name of all the upper nodes up to the root node R, possibly associated with a sequence number relative to the upper node.
- the first node of the first node of the third node of the first node attached to the root node can be referenced as follows: / c / a [last ] / b (l) / d
- the definition of the location of the transmitted document part P2, P3 can simply include a reference to the document part, this reference having been transmitted beforehand in the main part PI of the document, for example following the predefined value indicating that the following subset of information is not transmitted.
- the document or the parts PI, P2, P3 of the document to be transmitted are compressed beforehand.
- the structure information and the content information are distinguished, certain parts of the document possibly comprising no content information.
- the structure information consists of all the fields except the Val value fields, when these are not structured, that is to say are not decomposable into structured information subsets.
- these are the Val fields of the information subsets 1.1, 1.2.1.1, 1.2.2.1, 1.2.2.2, and 1.3.1, located at the lower ends of the branches of the tree structure of the document.
- the compression processing proper consists for example in sequentially reading the part of the document to be compressed, in applying an appropriate compression algorithm to process the structure information and in applying a compression algorithm adapted to the type of information when a Val field not decomposable appears during the reading of the document part. It should be noted that in the document or part of the compressed document, the structure information and the content information appear in the same order as in the original uncompressed document. We can also apply a statistical compression algorithm, such as Zip.
Landscapes
- Engineering & Computer Science (AREA)
- Databases & Information Systems (AREA)
- Theoretical Computer Science (AREA)
- Data Mining & Analysis (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Document Processing Apparatus (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
- Information Transfer Between Computers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0016507A FR2818409B1 (fr) | 2000-12-18 | 2000-12-18 | Procede pour diviser des documents structures en plusieurs parties |
FR0016507 | 2000-12-18 | ||
PCT/FR2001/004008 WO2002050708A1 (fr) | 2000-12-18 | 2001-12-14 | Procede pour diviser des documents structures en plusieurs parties |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1344151A1 true EP1344151A1 (fr) | 2003-09-17 |
Family
ID=8857802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01271587A Withdrawn EP1344151A1 (fr) | 2000-12-18 | 2001-12-14 | Procede pour diviser des documents structures en plusieurs parties |
Country Status (6)
Country | Link |
---|---|
US (2) | US7275060B2 (fr) |
EP (1) | EP1344151A1 (fr) |
JP (1) | JP4145144B2 (fr) |
AU (1) | AU2002219311A1 (fr) |
FR (1) | FR2818409B1 (fr) |
WO (1) | WO2002050708A1 (fr) |
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2000
- 2000-12-18 FR FR0016507A patent/FR2818409B1/fr not_active Expired - Fee Related
-
2001
- 2001-12-14 WO PCT/FR2001/004008 patent/WO2002050708A1/fr active Application Filing
- 2001-12-14 EP EP01271587A patent/EP1344151A1/fr not_active Withdrawn
- 2001-12-14 JP JP2002551735A patent/JP4145144B2/ja not_active Expired - Fee Related
- 2001-12-14 US US10/451,473 patent/US7275060B2/en not_active Expired - Fee Related
- 2001-12-14 AU AU2002219311A patent/AU2002219311A1/en not_active Abandoned
-
2007
- 2007-05-04 US US11/800,550 patent/US20070277096A1/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO0250708A1 * |
Also Published As
Publication number | Publication date |
---|---|
FR2818409B1 (fr) | 2003-03-14 |
US20040054669A1 (en) | 2004-03-18 |
AU2002219311A1 (en) | 2002-07-01 |
WO2002050708A1 (fr) | 2002-06-27 |
JP2004524606A (ja) | 2004-08-12 |
JP4145144B2 (ja) | 2008-09-03 |
FR2818409A1 (fr) | 2002-06-21 |
US20070277096A1 (en) | 2007-11-29 |
US7275060B2 (en) | 2007-09-25 |
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