JP4242701B2 - Storage search device, storage search program, and storage search program recording medium - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to middleware used in a computer system that stores and retrieves structured documents, and particularly stores and retrieves structured documents and meta information in an object-oriented database that does not have a function of storing meta information. Regarding middleware.
[0002]
[Prior art]
In recent years, structured documents such as XML (eXtensible Markup Language) have been used as data formats for sharing various information on the Internet. XML is a type of structured document standard that was standardized in December 1997 by the standardization body W3C (World Wide Web Consorium). Data written in accordance with the XML standard is called an XML document.
[0003]
An XML document is a document that can be read and edited by a person. However, at the same time, the XML document is structured using tags, and is also data that can be easily processed by a computer program. The tag of the XML document is a character string surrounded by “<” and “>” that is embedded in the document. The tag includes a start tag and an end tag, and an area surrounded by the start tag and the end tag is called an element. Elements can be described in a nested manner, such as having multiple child elements, each child element having multiple grandchild elements. Therefore, the XML document can express a multi-level tree structure.
[0004]
Currently, there is a wide variety of information expressed by XML documents, and the rules for tagging are defined in the XML standard, and are applied to specific uses. For example, RosettaNet (http://www.rosettanet.gr.jp/) and ebXML (http://www.ebxml.org/) for inter-company collaboration, RDF (
Resource Definition Framework, http://www.w3.org/RDF/), SVG (Scalable Vector Graphics) for multimedia information description, SMIL (Synchronized Multimedia Integration Language), and the like. In order to confirm that each of the above-mentioned XML documents for specific use is an XML document to be processed, an XML schema language (XML Schema, http://www.w3.org/ By performing verification using XML / Schema) and excluding non-standard XML documents, it is possible to focus processing only on the XML document to be processed.
[0005]
When a computer program processes an XML document, it is more convenient to convert the tree structure represented by the XML document into a tree structure on a computer memory. A representation of an XML document as a tree structure on a computer memory is called a DOM (Document Object Model). DOM is also standardized by W3C. DOM expresses an XML document with a node / link model composed of nodes and links. The elements of the XML document correspond to DOM nodes.
[0006]
When creating a system for processing DOM data on a computer memory, it is convenient if a search expression indicating a node in the DOM data can be used. Therefore, the notation method called XPath (XML Path Language) is also standardized by W3C. By using a path search expression such as XPath, it is possible to indicate a node that meets the conditions in the DOM data.
[0007]
Since various technologies related to XML as described above have been standardized and various computer systems have been developed based on XML, the need for a database for storing XML documents has increased in recent years. . There are roughly three types of databases that store XML: relational databases, object-oriented databases, and document databases.
[0008]
In order to store an XML document in a relational database, it is necessary to convert the XML document into a two-dimensional table which is a relational database storage model. At present, a relational database management system (RDBMS) based on a relational model is widely used in a customer management database, an article management database, and the like as a mainstream database management system (DBMS). Therefore, it is easy to use a highly reliable relational database management system (RDBMS), but in order to convert an XML document into a two-dimensional table format, the format and purpose of use of the original XML document are analyzed. It is necessary to study the optimal conversion method and design a relational schema. Therefore, the design / construction cost is high and it is suitable for large-scale system development, but is not suitable for medium- and small-scale system development.
[0009]
In order to store the XML document in the object-oriented database, the XML document may be stored in the database as it is. This is because the object-oriented database can store the tree structure, which is the basic structure of the XML document, as the parent-child relationship of the object as it is. For this reason, in medium and small scale system development where it is important to reduce system development costs and shorten the construction period, XML documents are stored in the database as tree structure data for the reason that complicated schema design is not necessary, and path retrieval formulas are used. Object-oriented databases that can be searched using are widely used. In the following description, an object-oriented database that stores structured documents is referred to as an object-oriented structured document database.
[0010]
When an XML document is stored in the document database, the structured document is stored as a sentence. The document database is a database in which a structured document is handled as a sentence, subjected to natural language analysis, indexed, and stored in the database. For this reason, the document database is used exclusively for storing text data among XML documents, but is not used except for system development for handling text.
[0011]
The structured document stored in the object-oriented structured document database is expressed by expressing the structured document shown in FIG. 19 as a tree structure of nodes and links as shown in FIG. It is realized by doing. 20B is a legend explaining the notation method of FIG. 20A. According to this legend, the tree structure always has a root node, and the elements of the structured document are element nodes. , Attributes are stored as attribute nodes, and character strings are stored as text nodes.
[0012]
The object-oriented structured document database has three functions of a tree structure acquisition function, a tree structure operation function, and a path search function for the tree structure of nodes and links.
[0013]
The tree structure acquisition function is a function for accessing a structured document stored in a database as a tree structure and acquiring node information. As a result, the database client can follow the tree structure and acquire node information. Also, by tracing the tree structure, the original structured document can be reconstructed. For example, the node n shown in FIG.₀₀₂Is designated as the base point, the partially structured document shown in FIG. 21 can be extracted.
[0014]
The tree structure operation function is a function for accessing a structured document stored in a database as a tree structure and operating node information. As a result, the database client can designate a node as a base point and add a new child node to the node. When this function is used, another structured document can be embedded in the structured document as a partially structured document. For example, the partially structured document shown in FIG.₀₀₂Is added to the child node, the tree structure shown in FIG. 23 is obtained. This function is called partial structured document insertion. As for the partially structured document insertion, the root node (n in FIG.₀₀₀) Is used as the base point to specify the insertion of the structured document itself, so that the entire document can be inserted into the structured document.
[0015]
The path search function is a function for acquiring a corresponding node group as a node set by a path search expression. The path is a character string in which a plurality of element names and attribute names are separated by “/”, and is a concept similar to a directory path used in the UNIX (registered trademark) OS and the like, and follows the tree structure of the structured document. Represents the order. A conditional expression can be added to the path search expression. The conditional expression instructs to narrow down the nodes when tracing the tree structure. FIG. 24 shows an example of a path search expression. In this example, it is shown that the author node of the child of the order node, the child node of the book node is returned, and the book node is limited to the book node whose value of the price node is 200 or more. The path search expression shown in FIG. 24 uses a root node as a base point, and a node set N = {n shown in FIG.₀₀₅} Is returned.
[0016]
As described above, the object-oriented database is suitable for a medium-sized database system that needs to store a structured document such as an XML document.
[0017]
The prior art document information related to this application includes the following.
[0018]
[Patent Document 1]
JP 2001-331479 A
[0019]
[Problems to be solved by the invention]
Conventionally, when a computer system is developed using an object-oriented database and an application program, additional information outside the document (for example, the creator, date, update history, etc. of the XML document) is added to a structured document such as an XML document. In many cases, this is referred to as meta information) and stored in an object-oriented database. In such a case, since there is a function of adding an arbitrary structure to the schema of the original XML document, it has been dealt with by a method of adding meta information to the schema of the XML document.
[0020]
However, in the above method, since the original XML document and the meta information part are not distinguished on the schema of the object-oriented database,
(1) When storing an XML document in an object-oriented database, the XML document and the meta information are combined and stored.
(2) When retrieving an XML document from an object-oriented database, the original XML document is extracted with the meta information part included.
The process is performed. Particularly for (2), if the XML document to be handled is a standardized XML document such as RDF or SMIL, the meta-information part will be an error as an invalid schema, so an XML document that does not conform to the standard will be used as it is as RDF or SMIL. The problem that it cannot be used for such processing occurs.
[0021]
For this reason, it is usually necessary to have means for deleting the meta information part, which is an unnecessary part of the application, so that it can be handled by RDF or SMIL processing. This causes the following problems in the development of the computer system. It was.
[0022]
(1) The application needs to cope with the addition and deletion processing of meta information, and the development cost is excessive.
[0023]
(2) The application needs to be corrected each time meta information increases.
[0024]
  The present invention has been made in view of the above circumstances, and even if the object-oriented structured document database does not have a function of storing meta information, addition / change / deletion of meta information can be performed without depending on an application program. Can respond flexibly toStorage retrieval device, storage retrieval program,It is another object of the present invention to provide a storage retrieval program recording medium.
[0025]
[Means for Solving the Problems]
  In order to achieve the above object, the present invention according to claim 1 is a storage and retrieval apparatus that accesses an object-oriented structured document database based on an instruction from an application program and performs information processing. Setting information storage means for storing information on the path of meta information of the structured document stored in the object-oriented structured document database; and the structured document received under the storage instruction from the application program In addition to storing in the structured document database, the meta information received from the application program is inserted into the structured document stored in accordance with the information about the path of the meta information stored in the setting information storage means, and extended. Storage means for storing as structured documents ,Based on a comparison between a path search expression that is a search instruction from the application program and information on the path of the meta information stored in the setting information storage unit, it is determined whether the document to be acquired is the structured document or the meta information. Search means for determining and separating the corresponding structured document or the meta information from the extended structured document stored in the object-oriented structured document database based on the determination result; The search means removes the meta information from the extended structured document when the determination result is a structured document.This is the gist.
[0026]
  The present invention described in claim 2A computer is caused to function as each means constituting the storage / retrieval apparatus according to claim 1.The gist.
[0027]
  The present invention described in claim 3The storage retrieval program according to claim 2 is recorded on a computer-readable recording medium.The gist.
[0031]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0032]
FIG. 1 is a schematic configuration diagram of a storage / retrieval system 1 according to an embodiment of the present invention. A storage / retrieval system 1 shown in FIG. 1 includes an application 100, a storage / retrieval apparatus 200, and an object-oriented structured document database (hereinafter referred to as a database) 300. The storage / retrieval system 1 may have any configuration such as a single device or a system in which each component is distributed and a plurality of devices are connected to the network.
[0033]
The application 100 is an application program that uses the storage / retrieval apparatus 200, and is an application program that needs to store a structured document in a database and retrieve a structured document during the processing. Here, the search formula used for searching the structured document is the above-described path search formula.
[0034]
The storage / retrieval apparatus 200 has a function of storing the structured document and meta information passed from the application 100 in the database 300 and a structured document and meta information stored in the database 300 with a path search expression passed from the application 100. A middleware program having a function of performing the above-described search and returning the search result to the application 100 is recorded and executed.
[0035]
The database 300 is an object-oriented structured document database that stores structured documents, and has the three functions of the above-described tree structure acquisition function, tree structure operation function, and path search function.
[0036]
More specifically, the storage / retrieval device 200 includes a control device 201, a setting information dictionary 202, a storage device 203, and a retrieval device 204.
[0037]
When receiving a path search expression from the application 100, the control device 201 controls the other devices 202 to 204 and returns the search result to the application 100.
[0038]
The setting information dictionary 202 is a dictionary that stores setting information that determines the operation of the storage / retrieval apparatus 200.
[0039]
The storage device 203 receives structured documents and meta information from the control device 201 and stores them in the database 300.
[0040]
The search device 204 receives a path search formula from the control device 201, performs a search on the database 300, and returns a return result to the control device 201.
[0041]
Note that the setting information stored in the setting information dictionary 202 includes a meta information path P indicating where the meta information is added to the structured document stored in the database 300.
[0042]
Next, the operation of the storage / retrieval system 1 according to the present embodiment will be described with reference to FIGS. Here, FIG. 2 is a flowchart showing a processing procedure of the storage / retrieval system 1. 3 to 5 are flowcharts for explaining in detail each step S100, S200, and S300 of FIG.
[0043]
As shown in FIG. 2, the storage / retrieval system 1 first sets a dictionary, and then stores a structured document or searches for a structured document in accordance with an instruction from the application 100 (steps S100 to S100). S400). In the case of processing a plurality of structured documents, step S100 is performed only once at the beginning, and thereafter, steps S200 and S300 are repeated in an arbitrary order for each structured document.
[0044]
Here, each step described above will be described. First, the dictionary setting step S100 will be described with reference to FIG.
[0045]
The user selects a meta information path set P that is a list of the meta information paths P described above._1-nIs generated (step S101), and the generated meta information path set P is generated._1-nIs input to the setting information dictionary 202 (step S102).
[0046]
Next, the structured document storing step S200 will be described with reference to FIG.
[0047]
The application 100 stores the structured document D and the meta information set M to be stored._1-nIs input to the control device 201 and the structured document storage is instructed (step S201). Meta information M_iIs the path P_iMeta information corresponding to.
[0048]
The control device 201 inputs the structured document D input in step S201 to the storage device 203 and instructs storage of the structured document (step S202).
[0049]
The storage device 203 inputs the structured document D input in step S202 to the database 300, and instructs insertion of all documents (step S203).
[0050]
The database 300 performs all document insertion using the structured document D input and designated in step S203 (step S204).
[0051]
Next, the control device 201 controls the meta information set M input in step S201._1-n, And a meta information path set P extracted from the setting information dictionary 202_1-nIs input to the storage device 203 to instruct storage of meta information (step S205).
[0052]
The storage device 203 uses the meta information M input in step S205._iMeta information path P_iTo input the partially structured document (step S206).
[0053]
The database 300 stores the meta information M input and instructed in step S206._i, And meta information path P_iThe partially structured document insertion is executed based on (Step S207). At this time, the meta information path P_iMeta information M at the position indicated by_iInsert.
[0054]
Next, the structured document search step S300 will be described with reference to FIG.
[0055]
The application 100 generates a path search formula Q for acquiring a structured document or meta information from the database 300 (step S301). At this time, the structured document D and the meta information set M are included in the conditions of the path search expression Q._1-nYou can specify a path that points to.
[0056]
The application 100 inputs the path search formula Q generated in step S301 to the control device 201 and instructs the search execution (step S302).
[0057]
The control device 201 inputs the path search formula Q input in step S302 to the search device 204 and instructs the search execution (step S303).
[0058]
When the search device 204 inputs the path search formula Q input in step S303 to the database 300 and instructs execution of the search, the database 300 executes the search and sends the node set N to the search device 204._1-mIs returned (step S304).
[0059]
The search device 204 uses the node set N returned in step S304._1-mIs returned to the control device 201 (step S305).
[0060]
The control device 201 reads the meta information path set P from the setting information dictionary 202._1-nAnd the meta information path set P_1-nAnd path P excluding the condition from path search formula Q_QAre compared (step S306). Specifically, this is a meta information path set P_1-nAll meta information paths P in_kPass P_QIs meta information path P_kJudgment is made based on whether it points to itself or its descendant nodes. Path P_QIs meta information path P_kIf it does not point to itself or its descendant nodes, the path search expression Q is regarded as pointing to the partially structured document set of the structured document D, and step S308 is executed. On the other hand, the path P_QIs meta information path P_kWhen pointing to itself or its descendant nodes, the path search expression Q is the meta information set M_1-nAnd the step S309 is executed (step S307).
[0061]
Path P_QIs meta information path P_kWhen the control device 201 does not point to itself or its descendant nodes, the control device 201 returns the node set N returned in step S305._1-mIndividual node N_jA partially structured document is acquired for (Step S308). Partially structured document acquisition is performed by node N_jAll of the following descendant nodes are obtained and assembled into a structured document. However, at this time, from the setting information dictionary 202, the meta information path set P_1-nAre acquired for nodes corresponding to these paths. Node N generated by this_jA partially structured document with a vertex as a partially structured document E_jAnd Finally, node set N_1-mPartially structured documents are generated for all nodes of the partial structured document set E_1-mGet.
[0062]
On the other hand, the path P_QIs meta information path P_kWhen indicating the node itself or its descendant nodes, the control device 201 determines that the node set N returned in step S305._1-mIndividual node N_jA partially structured document is acquired for (Step S309). Partially structured document acquisition is performed by node N_jAll of the following descendant nodes are obtained and assembled into a structured document. Node N generated by this_jA partially structured document with a vertex as a partially structured document E_jAnd Finally, node set N_1-mA partial structured document is generated for all nodes of the partial structured document set E._1-mGet.
[0063]
The control device 201 executes the partially structured document set E generated in step S308 or S309._1-mIs returned to the application 100 (step S310).
[0064]
Next, specifically, XML (eXtensible Markup Language) is used as a structured document, and the database 300 is stored using a database that supports XPath (XML Path Language) as a path search expression (hereinafter referred to as XML DB). -The search system 1 is demonstrated.
[0065]
The storage / retrieval system 1 performs the operation shown in the flowchart of FIG. Here, in actual processing, steps S200 and S300 are repeated as many times as necessary depending on the purpose of use of the application 100 and the user's operation. However, for the sake of explanation, steps S100 to S300 are performed only once. To do.
[0066]
First, the dictionary setting step S100 will be described with reference to FIG.
[0067]
The user makes the meta information path P shown in FIG.₁And P₂Meta information path set P that is a list of_1-2Is generated (step S101).
[0068]
The user then sets the meta information path set P generated in step S101._1-2Is set in the setting information dictionary 202 (step S102).
[0069]
Next, the structured document storing step S200 will be described with reference to FIG.
[0070]
The application 100 includes a structured document D shown in FIG. 7 and a meta information set M shown in FIG._1-2Is input to the control device 201 and the structured document storage is instructed (step S201). Meta information M_i(I = 1, 2) is the path P_iMeta information corresponding to (i = 1, 2).
[0071]
The control device 201 inputs the structured document D input in step S201 to the storage device 203 and instructs storage of the structured document (step S202).
[0072]
The storage device 203 inputs the structured document D input in step S202 to the database 300, and instructs insertion of all documents (step S203).
[0073]
The database 300 performs all document insertion using the structured document D input and designated in step S203 (step S204). The structure of the stored structured document D in the database is shown in FIG.
[0074]
The control device 201 reads the meta information set M input in step S201._1-2, And the meta information path set P extracted from the setting information dictionary 202_1-2Is input to the storage device 203 to instruct storage of meta information (step S205).
[0075]
The storage device 203 uses the meta information M input in step S205._iMeta information path P_iAccordingly, the data is input to the database 300 and a partial structured document insertion is instructed (step S206).
[0076]
The database 300 stores the meta information M input and instructed in step S206._i, And meta information path P_iThe partially structured document insertion is executed based on (Step S207). At this time, the meta information path P_iMeta information M at the position indicated by_iInsert. Inserted structured document D and meta information set M_1-2The structure in the database is shown in FIG. In FIG. 10, the meta information path P₁N₀₀₆Meta information M at the position of₁Is the meta information path P₂N₀₀₇Meta information M at the position of₂Has been inserted.
[0077]
Next, the structured document search step S300 will be described with reference to FIG.
[0078]
The application 100 generates a path search formula Q shown in FIG. 11 for acquiring a structured document from the database 300 (step S301). The path search formula Q shown in FIG. 11 specifies meta information as a condition (the filename attribute that is meta information is 'homepage1.xml'), and represents acquisition of a partially structured document of the structured document D ( Get a partially structured document under the path “/ RDF”).
[0079]
The application 100 inputs the path search formula Q generated in step S301 to the control device 201 and instructs the search execution (step S302).
[0080]
The control device 201 inputs the path search formula Q input in step S302 to the search device 204 and instructs the search execution (step S303).
[0081]
When the search device 204 inputs the path search formula Q input in step S303 to the database 300 and instructs execution of the search, the database 300 executes the search and sends the node set N to the search device 204._1-mIs returned (step S304). Node set N to be returned_1-m(M = 1, N₁) Is shown in FIG.
[0082]
The search device 204 uses the node set N returned in step S304.₁Is returned to the control device 201 (step S305).
[0083]
The control device 201 reads the meta information path set P from the setting information dictionary 202._1-2And the path P obtained by removing the condition from the path search formula Q_Q(Step S306). Path P in this example_QIs shown in FIG. Path P_QThe path indicated by “RDF” is a child node of the root node. Meta information path set P_1-2All meta information paths P in_kPass P_QThe node pointed to by the meta information path P_kMeta information path P that is itself or its descendant node_kTherefore, the path search formula Q is regarded as returning a partially structured document set of the structured document D, and step S308 is executed (step S307).
[0084]
The control device 201 sets the node set N returned in step S305.₁Node N of₁A partially structured document is acquired for (Step S308). Partially structured document acquisition is performed by node N₁All of the following descendant nodes are obtained and assembled into a structured document. At this time, however, the meta information path set P shown in FIG._1-2And nodes corresponding to these paths are not acquired. Node N generated by this₁A partially structured document with a vertex as a partially structured document E₁And In this example, the node set N₁Node is node N₁Only because node N₁More partially structured document set E₁Get. The partially structured document set E generated in FIG.₁Indicates. At this time, the meta information added to the tree structure in the database 300 is stored in the partially structured document set E.₁Only the elements included in the original structured document D are output.
[0085]
The control device 201 executes the partially structured document set E generated in step S308.₁Is returned to the application 100 (step S310).
[0086]
Next, processing in the case where the path search formula Q acquires meta information in step S307 will be described below.
[0087]
The application 100 generates a path search formula Q ′ shown in FIG. 15 for acquiring a structured document from the database 300 (step S301). The path search expression Q 'specifies a structured document as a condition (the "/ RDF / Description / dc: creator" element of the structured document is' Kasuga'), and represents the acquisition of a partially structured document of meta information. (Acquires partially structured documents under the path “/ RDF / change_log / log”).
[0088]
The application 100 inputs the path search formula Q ′ generated in step S301 to the control device 201 and instructs execution of search (step S302).
[0089]
The control device 201 inputs the path search formula Q ′ input in step S302 to the search device 204 and instructs the search execution (step S303).
[0090]
The search device 204 inputs the path search formula Q ′ input in step S303 to the database 300 and instructs the search execution (step S304). The database 300 executes the search, and sends the node set N ′ to the search device 204._1-mTo return. Node set N 'to be returned_1-m(M = 1, N ′₁) Is shown in FIG.
[0091]
The search device 204 returns the node set N ′ returned in step S304.₁Is returned to the control device 201 (step S305).
[0092]
The control device 201 reads the meta information path set P from the setting information dictionary 202._1-2And the path P obtained by removing the condition from the path search formula Q_{Q '}(Step S306). Path P in this example_{Q '}Is shown in FIG. Path P_QThe path pointed to by the meta information set M₂This is the “log” node of the child node. Meta information path set P_1-2All meta information paths P in_kPass P_QThe node pointed to by the meta information path P_kMeta information path P that is itself or its descendant node_k("Meta information path P₂”), The path search expression Q ′ is the meta information set M_1-2The step S309 is executed assuming that the partially structured document set is returned (step S307).
[0093]
The control device 201 determines that the node set N ′ returned in step S <b> 305.₁Node N '₁A partially structured document is acquired for (Step S309). Partially structured document acquisition is performed by the node N ′₁All of the following descendant nodes are obtained and assembled into a structured document. Node N ′ generated thereby₁A partially structured document having a vertex as a partially structured document E ′₁And In this example, the node set N '_1-Is the node N '₁Only node N '₁More partially structured document set E ′₁Get. The partially structured document set E ′ generated in FIG.₁Indicates.
[0094]
The control apparatus 201 executes the partially structured document set E ′ generated in step S309.₁Is returned to the application 100 (step S310).
[0095]
Therefore, according to the storage / retrieval system 1 of the present embodiment, the storage / retrieval apparatus 200 as middleware is used between the database 300 having no function of storing meta-information and the application 100, so that it depends on the application 100. Therefore, it is possible to flexibly cope with addition / change / deletion of meta information, so that convenience of system design / development can be improved.
[0096]
Specifically, when storing a structured document in an object-oriented structured document database, meta information can be stored together. When searching for a structured document, the structured document and meta information are stored together. Can be acquired separately. Further, when acquiring a structured document, it is possible to search using meta information as a condition, and when acquiring meta information, it is possible to search using a structured document as a condition.
The middleware program stored in the storage / retrieval apparatus 200 of the above embodiment may be recorded on a computer-readable recording medium such as a hard disk, a flexible disk, a CD-ROM, an MO, or a DVD-ROM. It is also possible to distribute via
[0097]
【The invention's effect】
  As described above, according to the present invention, even if the object-oriented structured document database does not have a function of storing meta information, it is flexible to add / change / delete meta information without depending on the application program. Can respond toStorage retrieval device, storage retrieval program,In addition, a storage retrieval program recording medium can be provided.
[0098]
Accordingly, it is possible to reduce the system development cost of a computer system that stores and retrieves structured documents and meta information using an object-oriented structured document database that does not have a function of storing meta information.
[Brief description of the drawings]
FIG. 1 is a schematic configuration diagram of a storage / retrieval system according to an embodiment of the present invention.
FIG. 2 is a flowchart showing the operation of the storage / retrieval system according to the embodiment of the present invention.
FIG. 3 is a flowchart showing dictionary setting operation of the storage / retrieval system according to the embodiment of the present invention;
FIG. 4 is a flowchart showing the storage operation of the structured document of the storage / retrieval system according to the embodiment of the present invention.
FIG. 5 is a flowchart showing a structured document search operation of the storage / retrieval system according to the embodiment of the present invention;
FIG. 6 is an example of a meta information path.
FIG. 7 is an example of a structured document.
FIG. 8 is an example of meta information.
FIG. 9 is an example of a structured document stored in an object-oriented structured document database.
FIG. 10 is an example of a structured document stored in an object-oriented structured document database.
FIG. 11 is an example of a path search expression.
FIG. 12 is an example of a node set.
FIG. 13 is an example of a path.
FIG. 14 is an example of a partially structured document.
FIG. 15 is an example of a path search expression.
FIG. 16 is an example of a node set.
FIG. 17 is an example of a path.
FIG. 18 is an example of a partially structured document.
FIG. 19 is an example of a structured document.
FIG. 20 is an example of a structured document stored in an object-oriented structured document database.
FIG. 21 is an example of the extracted partially structured document.
FIG. 22 is an example of a partially structured document to be inserted.
FIG. 23 is an example of a structured document stored in an object-oriented structured document database after insertion.
FIG. 24 is an example of a path search expression.
[Explanation of symbols]
1 Storage / retrieval system
100 applications
200 Storage / retrieval device
201 Control device
202 Setting information dictionary
203 Storage device
204 Search device
300 Object-oriented structured database

Claims (3)

A storage and retrieval apparatus that accesses an object-oriented structured document database based on an instruction from an application program and performs information processing,
Setting information storage means for storing information on a path of meta information of the structured document stored in the object-oriented structured document database together with the structured document;
The structured document received under the storage instruction from the application program is stored in the object-oriented structured document database, and the meta information received from the application program is stored in the setting information storage means Storage means for inserting into the stored structured document and storing it as an extended structured document according to information about the path of the meta information;
Whether the document to be acquired is the structured document or the meta information based on a comparison between a path search expression that is a search instruction from the application program and information on the path of the meta information stored in the setting information storage unit. Search means for determining and separating the corresponding structured document or the meta information from the extended structured document stored in the object-oriented structured document database based on the determination result; ,
The retrieval unit is characterized in that, when the determination result is a structured document, the meta information is removed from the extended structured document . A storage retrieval program for causing a computer to function as each means constituting the storage retrieval device according to claim 1. A storage retrieval program recording medium, wherein the storage retrieval program according to claim 2 is recorded in a computer-readable recording medium.

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