JP2003323427A - Xml information retrieving device and method, program for executing method, and recording medium for recording program for executing method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To dispense with the processing unnecessary for retrieval processing, and to increase a speed of the retrieval processing by registering the XML data form necessary for the retrieval request application in advance by a general-purpose method, when the information of the XML data is retrieved. <P>SOLUTION: An XML data registration processing part 1 incorporates the form of XML necessary for the retrieval request AP (application) in the XML data registration processing in advance with the configuration of an XSLT style sheet, an attribute value of the data is registered in a database part 2, and simultaneously the XML data of the form used in AP, is created and simultaneously registered in the database part 2 as a letter string data with the attribute. Upon retrieving, an XML data retrieval processing part 3 retrieves the database part 2 on the basis of the attribute value, and the return of data is performed by receiving the XML data of the form necessary in AP, registered in advance as a result of the retrieval, and immediately returning the same. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a standard XML information retrieval apparatus and method such as MPEG7 used for content retrieval in broadband, and a method of high speed response using a storage method based on XML data structure. The present invention relates to an XML information search device and method.

[0002]

2. Description of the Related Art In a conventional XML data search system,
Generally, the XML structure is converted into a DOM tree, and it is converted into an RDB.
Stored as a structure or an object structure such as a directory tree. When searching XML data, use XPAT
When the attribute name and attribute value are specified by H etc., the storage location of the corresponding data is fixed with a small amount of processing using the full text search index or RDB index, and the data entity is stored in memory based on the storage location information. There is a method in which the data is transferred to the DOM tree and is configured in the form of a DOM tree, and the data is shaped and output in the form defined by the XSLT style sheet or the like.

By constructing the XML data storage / retrieval method by such a method, a general-purpose data retrieval means is realized.

[0004]

However, in the method of storing the structure decomposed by the DOM tree formation as the RDB structure or the object structure and reconstructing it into the XML structure at the time of the search, when the search is executed. Since shaping to the output format is necessary and the processing amount of this shaping processing is generally larger than that of simple data search processing, etc., it hinders response performance especially in online applications that require responsiveness. The cause (known in the XML field). Also, if XML data is transferred without being shaped, it will be transferred over the network including data that is not originally needed. Therefore, multiple data that is generated when a list is displayed by an application can be transferred continuously. It is considered that a large amount of data is transferred by network communication in the processing such as the transfer to the server, which may be a factor of extending the processing time.

According to the present invention, the XML information retrieval processing is performed at high speed by eliminating the processing unnecessary for the retrieval processing by applying the XML data format required by the retrieval request application to the registration processing in advance by a general-purpose method. Provided is an XML information search device and method having an XML information registration means and method for realizing realization.

[0006]

In order to achieve the above object, the XML information search device according to the first embodiment of the present invention uses an XML data retrieval unit for a plurality of XML data sets having a schema having a large fixed structure ratio. The XML data registration processing unit that analyzes the data and stores it in the database unit, and selects the XML data satisfying the conditions from the collection of XML data using the search request given by the user, and at the same time responds to the return form designation given by the user. An XML information search system having an XML data search processing unit for outputting XML data in a form at high speed, wherein the XML data registration processing unit, when registering the XML data, outputs the schema information given the structure of the XML data. "XML structure analysis means" for original analysis and XM
“Index data creating means” for generating index information using a fixed data attribute portion in XML, which is necessary for quickly specifying a data storage position at the time of search, from the result of the L structure analysis, X of the configuration required by the client application that makes the search request
"Return XML form reconstructing means" for generating return form shaping XML data required to compose and register return XML data at the time of registration in order to return ML data from the server to the client at high speed When,
It has "transaction control means" for controlling registration of the XML data, index data, and return form shaping XML data, and the database unit stores and manages the XML data, index data, and return form shaping XML data. The XML data search processing unit analyzes the search request transmitted from the client,
"Search request analysis means" for determining which element of the database part to use, and "search expression generation means" for forming a search expression for searching the database part from the information obtained from the search request analysis means. "Search expression executing means" for controlling execution of the search expression output from the search expression generating means and searching the database section, and "XML data return" for receiving search results and controlling XML data return to the client. It is characterized by having "means".

Alternatively, in the XML information search device according to the second aspect of the present invention, in the above XML information search device, the XML data registration processing unit has a fixed data attribute in the XML in addition to the “index data creation means”. It has "full-text search index data creating means" for generating full-text search index information, which corresponds to searches for parts other than parts, and the XML data search processing section has "search request analysis means".
However, when a search request is accepted, it is determined which of the above-mentioned "index data creation means" and "index data creation means for full-text search" to be used from the schema definition information, and the processing is to be distributed. , "Full-text search means" that performs a search using the full-text search index when the index generated by "Full-text search index data creation means" is used separately from the "search expression execution means" It is characterized by having.

Alternatively, the XML information search method according to the present invention 1 analyzes XML data for a collection of a plurality of XML data having a schema having a large fixed structure ratio, and registers the XML data to be stored in a database unit. Processing and XML data search processing for selecting XML data satisfying a condition from a collection of XML data using a search request given by the user, and at the same time outputting XML data in a form corresponding to the return form designation given by the user at high speed. X with and
An ML information retrieval system, wherein in XML data registration processing, an XML structure analysis procedure for analyzing the structure of XML data based on given schema information at the time of XML data registration and the result of XML structure analysis. , It is necessary to specify the data storage position at the time of retrieval at high speed.
"Index data creation procedure" for creating index information using a fixed data attribute part in XML
And, in order to quickly return the XML data of the configuration required by the client application that makes the search request from the server to the client at the time of registration, the data required for configuring and registering the return XML data is generated according to the definition file. And a “transaction control procedure” for controlling registration of the above XML data, index data, and return form shaping XML data in the database unit. The search request sent from the client is analyzed, and the database section is searched from the "search request analysis procedure" for determining which element of the database section to use and the information obtained in the search request analysis procedure. The search expression generation procedure that configures the search expression for And perform a search expression execution control, searches the database unit as "search expression execution procedure", receives a search result, performs the XML data return control of the client f, characterized in that it has a "XML data return procedure".

Alternatively, in the XML information search method according to the present invention 2, in the XML information search method described above, in the XML data registration process, in addition to the "index data creation procedure", a fixed data attribute part in XML is included. It has a "full-text search index data creation procedure" that generates full-text search index information that also supports searches for other than "search request analysis procedure" in XML data search processing.
Then, when a search request is accepted, it is determined from the schema definition information which of the above-mentioned "index data creation procedure" or "full-text search index data creation procedure" to be used, and the processing is sorted,
Separately from the index search by "Search formula execution procedure",
It is characterized by having a "full-text search procedure" for performing a search using the full-text search index when the index generated by the "full-text search index data creation procedure" is used.

Alternatively, the procedure in the above XML information retrieval method is a program for executing the XML information retrieval method for causing a computer to execute.

Alternatively, an execution program of the XML information search method for causing a computer to execute the procedure in the method described in the XML information search method is recorded in a recording medium readable by the computer.

In the present invention, the XML format required by the search request AP (application) is set in advance, for example, XS.
Incorporate it in the XML data registration process in the form of LT stylesheet, etc., and register the attribute value of the data in the RDB structure, and at the same time generate the XML data in the form used in AP and simultaneously generate the character string data with the attribute in the RDB. It is registered, and when the search is performed, the search is performed based on the attribute value, and for the data return, the XML data in the form required by the AP registered in advance is immediately returned. As a result, conventionally, the process of converting the data to be searched into the form required by the application at the time of searching is unnecessary, and it is possible to obtain the same performance as the case of using a simple RDB as the search speed.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a system configuration diagram showing Embodiment 1 of the present invention 1, and FIG. 2 is a system configuration diagram showing Embodiment 2 of the present invention 2. In any system configuration, the registration system receives XML data from the outside (from the left arrow in the figure) and performs necessary data decomposition and reconfiguration to register the data in the database unit 2. Further, the search system receives a search request from the outside, specifies the target XML data according to the search condition and the return form request, and returns the XML data of the specified form.

An embodiment in which MPEG7 is used is shown below.

FIG. 1 shows the configuration of the XML data registration / retrieval system in the first embodiment, and FIG. 2 shows the configuration of the XML data registration / retrieval system in the second embodiment. Both registration and search systems are RDB and X
The server system has the ML data registration processing unit 1 and the XML data search processing unit 3. The XML data registration processing unit 1 connects a plurality of client systems to this server system via a computer network, and each performs data registration in XML data units under transaction control. In addition, the XML data search processing unit 3 connects a plurality of client systems to the server system via a computer network, and transmits the XML data required by the client application at high speed according to the search conditions issued from each client. can do.

The server system of the first embodiment is XML
It is composed of a data registration processing unit 1, a database unit 2, and an XML data search processing unit 3. Here, the XML data registration processing unit 1 includes an “XML structure analysis unit” 11, an “index data creation unit” 12, a “return XML form reconfiguration unit” 13, and a “transaction control unit” 14, and a database unit. 2 is the "attribute index section" 2
1. The XML data search processing unit 3 includes a "data entity unit" 22, a "search request analysis unit" 31, a "search expression generation unit" 32, a "search expression execution unit" 33, and an "XML data return unit". It is composed of 34.

The XML data registration processing unit 1 analyzes XML data for a set of a plurality of XML data having a schema having a large fixed structure ratio and stores the XML data in the database unit 2. The XML data search processing unit 2 selects XML data satisfying a condition from a collection of XML data using a search request given by the user, and at the same time outputs the XML data in a form corresponding to the return form designation given by the user at high speed. To do.

In the XML data registration processing unit 1, "X
The "ML structure analysis unit" 11 performs the X process when the XML data is registered.
The structure of the ML data is analyzed based on the given schema information. The “index data creation unit” 12 generates index information, which uses a fixed data attribute portion in XML, which is necessary to specify a data storage position at the time of search, from the result of the XML structure analysis. To do. The "return XML form reconfiguration unit" 13 is required to configure and register the return XML data at the time of registration in order to quickly return the XML data of the configuration required by the client application that makes the search request from the server to the client. Flexibly generate return form shaping XML data according to the definition file. The “transaction control unit” 14 controls registration of the above XML data, index data, and return form shaping XML data.

The database unit 2 stores and manages the above XML data, index data, and return form shaping XML data.

In the XML data search processing unit 3, the "search request analysis unit" 31 analyzes the search request transmitted from the client and determines which element of the database unit 2 to use. The “search formula generation unit” 32 constitutes a search formula for searching the database unit 2 from the information obtained from the search request analysis unit 31. The “search formula execution unit” 33 controls the execution of the search formula output from the search formula generation unit 32 and searches the database unit 2. The “data return unit” 34 receives the search result and controls the XML data return to the client.

The server system of the second embodiment is also XML.
It is composed of a data registration processing unit 1, a database unit 2, and an XML data search processing unit 3. Here, the XML data registration processing unit 1 includes an “XML structure analysis unit” 11, an “index data creation unit” 12, a “return XML form reconfiguration unit” 13, a “transaction control unit” 14, and a “full text search index”. The database unit 2 includes an “attribute index unit” 21, a “data entity unit” 22, and a “full-text search index unit” 23. The XML data search processing unit 3 includes a “search request”. "Analysis unit" 31, "Search formula generation unit" 32, "Search formula execution unit" 3
3, "XML data return unit" 34, "Full text search execution unit"
It consists of 35.

In the server system of the second embodiment,
Explaining the difference from the first embodiment, the XML data registration processing unit 1 flexibly supports not only the “index data creation unit” 12 but also a search other than the fixed data attribute part in XML. "Full-text search index data creation unit" that generates full-text search index information 1
5, the XML data search processing unit 3 has either the “index data creation unit” 12 or the “full-text search index data creation unit” 15 when the “search request analysis unit” 31 receives a search request. Whether to use the generated index of the schema is determined from the schema definition information, and the processing is distributed. In addition to the index search by the "search expression execution unit" 33, the index generated by the "full-text search index data creation unit" 15 Has a "full-text search execution unit" 35 for performing a search using the full-text search index.

The client system is accessed from a communicable computer via the API.

The processing of the system having the above-mentioned configuration is performed by the XM.
It is roughly divided into L data registration processing and search processing.

<Registration Processing of XML Data Corresponding to First Embodiment> 1. The XML data is sent to the “XML
L structure analysis unit ”11. 2. The “XML structure analysis unit” 11 analyzes the structure of XML data based on the XSLT style sheet and decomposes it into each attribute and attribute value. At this point, it also verifies whether the structure of the XML data is invalid, and if it is invalid, returns an error. 3. The “transaction control unit” 14 declares the start of an update transaction for the “database unit” 2 at this point. 4. The input XML data is registered in the “database part” 2 as one record in the XML data storage table of the “data substance part” 22. 5. The “index data creation unit” 12 receives each XML attribute and attribute value from the “XML structure analysis unit” 11 and creates index data to be used at the time of search based on a rule given in advance. 21 in the attribute value storage table. 6. The "returning XML form reconstructing unit" 13 receives each XML attribute and attribute value from the "XML structure analyzing unit" 11 and is required in response to a return form request at the time of retrieval based on a rule given in advance. The data is reformed into a plurality of XML forms, and each is registered in the AP return form XML data storage table group of the “data substance part” 22. 7. The “transaction control unit” 14 commits the update processing to the “database unit” 2 at this point. 8. If there is unregistered input XML data, the process returns to 1 above and the registration process is performed again. If there is no unregistered data, the registration process ends.

A flow chart of the above XML data registration processing is shown in FIG.

<XML Data Search Processing Corresponding to Embodiment 1> A client for XML data search specifies a search condition based on the correspondence between the attribute name and the attribute value of the data and sends it to the “search request analysis unit” 31. 2. The “search request analysis unit” 31 determines from the attribute name which table / column of the attribute value storage table of the “attribute index unit” 21 the search request is sent to the “search expression generation unit” 32. 3. The "search formula generation unit" 32 generates a search formula (SQL sentence) for the "database unit" 2 based on the table name / column name corresponding to the input attribute name and the attribute value, and To the "execution unit" 33. 4. The “search formula execution unit” 33 executes the input search formula to the “database unit” 2. In the “database part” 2, the ID group of the XML data to be returned is determined from the attribute value storage table of the “attribute index part” 21 and the table of the “data substance part” 22 corresponding to the return format designated by the input Thus, the record corresponding to this ID group is searched. 5. The “XML data return unit” 34 receives the search result from the “database unit” 2 executed by the “search expression execution unit” 33, and returns the XML data to the client.

A flow chart of the above XML data search processing is shown in FIG.

<Registration Processing of XML Data Corresponding to Second Embodiment> 1. The XML data is sent to the “XML
L structure analysis unit ”11. 2. The “XML structure analysis unit” 11 analyzes the structure of XML data based on the XSLT style sheet and decomposes it into each attribute and attribute value. At this point, it also verifies whether the structure of the XML data is invalid, and if it is invalid, returns an error. 3. The “transaction control unit” 14 declares the start of an update transaction for the “database unit” 2 at this point. 4. The "full-text search index generation unit" 15 generates an index for full-text search from the XML data and stores it in the "full-text search index unit" 23. 5. The input XML data is registered in the “database part” 2 as one record in the XML data storage table of the “data substance part” 22. 6. The “index data creation unit” 12 receives each XML attribute and attribute value from the “XML structure analysis unit” 11 and creates index data to be used at the time of search based on a rule given in advance. 21 in the attribute value storage table. 7. The "returning XML form reconstructing unit" 13 receives each XML attribute and attribute value from the "XML structure analyzing unit" 11 and is required in response to a return form request at the time of retrieval based on a rule given in advance. The data is reformed into a plurality of XML forms, and each is registered in the AP return form XML data storage table group of the “data substance part” 22. 8. The “transaction control unit” 14 commits the update processing to the “database unit” 2 at this point. 9. If there is unregistered input XML data, the process returns to 1 above and the registration process is performed again. If there is no unregistered data, the registration process ends.

The flow of the above XML data registration processing is shown in FIG. 5 as a flowchart.

<XML Data Retrieval Processing Corresponding to Second Embodiment> 1. A client for XML data search specifies a search condition based on the correspondence between the attribute name and the attribute value of the data and sends it to the “search request analysis unit” 31. 2. The "search request analysis unit" 31 determines from the specified attribute name whether the target is the attribute name index or the full-text search index, and in the case of the attribute name index, the attribute name is used. It is determined which table / column of the attribute value storage table of the “attribute index section” 21 is the search request, and it is determined by the “search expression generation section”
Send to. If the index is a full-text search index, the conditional expression is sent to the “full-text search execution unit” 35. 3. The "search formula generation unit" 32 generates a search formula (SQL sentence) for the "database unit" 2 based on the table name / column name corresponding to the input attribute name and the attribute value, and To the "execution unit" 33. 4. The “search expression execution unit” 33 executes the input search expression on the “database” 2. In the “database part” 2, the ID group of the XML data to be returned is determined from the attribute value storage table of the “attribute index part” 21 and the table of the “data substance part” 22 corresponding to the return format designated by the input As a result, I
Records corresponding to the D group are searched. 5. The "full-text search execution unit" 35 searches the "data entity part" 22 via the "full-text search index part" 23 based on the input conditions, and determines the XML data group to be searched as a search result. Let 6. The “XML data return unit” 34 receives the search result from the “database unit” 2 executed by the “search expression execution unit” 33, and returns the XML data to the client.

A flow chart of the above XML data retrieval processing is shown in FIG.

<Application image when this server system is used> As XML data, an application example of MPEG7 data which is a standard specification as video content description XML will be shown.

The schema specification defined by MPEG7 is represented by a tree structure. Using this schema described in XSLT, the structural analysis of the input XML data is performed. At this stage, if a required data item (for example, a video title) does not exist, it is recognized as abnormal data and an error occurs. In addition, if an abnormal schema is detected, such as a mandatory data value is not entered (there is no attribute value even if there is a title item), or a repeat exists in a place where it is not permitted by the number of repeats, etc. , Is treated as an error as well.

The MPEG7 data can hold an extensible schema part in addition to the part where the schema is specified in detail. In the present invention, attribute decomposition is not performed for such a portion where details cannot be specified in advance, and data is stored only in the XML data storage table in the configuration diagrams of FIGS. 1 and 2.

When considering use from a video search application using MPEG7 data, generally, all attributes are used after narrowing down to one data, and as an application example, The following examples can be considered.

<Scope of Embodiment 1> (1) Consider a video content search system from a client system using the server system of the present invention.
This example includes one server system of the present invention, a server system that separately distributes video contents, and a client terminal. The client system first accesses the server system of the present invention to search from a large number of video contents for contents to be viewed / purchased from various viewpoints, and accesses the video content distribution server for the substance data of the contents determined there. The flow is to watch and purchase at.

(2) In order to search the genre, only the list of genres is searched. At that time, an XML data storage table consisting of only genres registered in advance is defined by an XSLT style sheet, data is prepared, and a search is performed for this. In this case, since the amount of one data is small, even if it is requested to return about 1000 data, the total amount of data does not increase so much, so that the influence on the data transfer delay is small.

(3) Next, one genre is designated and a list of title names and director names is output. Similar to the search of the genre list described above, an XSLT style sheet is defined in advance and data is prepared. 1 compared to the genre list
The amount of data per item will increase this time, but conversely, the number of data items to be output can be reduced, so
The total amount of data does not increase, and performance deterioration in response performance can be suppressed.

(4) Finally, if one content is decided,
A full set of XML data corresponding thereto is searched from the XML data storage table in the configuration diagram of FIG. In this case, the size of one piece of data is quite large, but when considering detailed display on the application side, the number of cases required is only one to a few, so the data transfer rate is high. Is no problem.

In addition to the above, as a keyword search, the following usage methods are also possible.

<Scope of Embodiment 2> (5) For a keyword on a schema that is not defined, a full-text search logic is separately used, and a full-text search index is prepared at the time of registration. Section "31
According to the input condition, whether to use the fixed schema target index or the full-text search index corresponding to the extension part is discriminated.
It is also possible to search the 7 extended schema part.

It should be noted that some or all of the functions of each processing unit in the server system shown in FIGS. 1 and 2 are configured by a computer program, and the program is executed by the computer to implement the present invention. Needless to say, or it is possible to configure the processing procedure shown in FIG. 3 to FIG. 6 by a computer program and have the computer execute the program, or , A computer-readable recording medium such as an FD (floppy disk (registered trademark)), an MO, a ROM, a memory card, or a C for executing a program for causing the computer to execute the processing procedure.
It can be recorded on a D, DVD, removable disk, etc., and can be saved or distributed. It is also possible to provide the above program through a network such as the Internet or electronic mail.

[0045]

According to the present invention, in the conventional XML data retrieval system, the processing time required for shaping the data into the required data format while minimizing the data communication amount at the time of returning the data is unnecessary. So it's a fast X
ML data search can be realized. In addition, since the server does not send unnecessary data to the client, the amount of data generally tends to become large.
It is also effective in terms of network usage efficiency in data transmission over the network. With this, it is possible to provide a better XML application service to an individual or the whole user.

[Brief description of drawings]

FIG. 1 is a system configuration diagram in a first embodiment of the present invention.

FIG. 2 is a system configuration diagram in a second embodiment of the present invention.

FIG. 3 is a flowchart of registration-related processing according to the first embodiment of the present invention.

FIG. 4 is a flowchart of a search system process according to the first embodiment of the present invention.

FIG. 5 is a flowchart of registration-related processing according to the second exemplary embodiment of the present invention.

FIG. 6 is a flowchart of a search system process according to the second embodiment of the present invention.

[Explanation of symbols]

1 ... XML data registration processing unit 11 ... XML structural analysis unit 12 ... Index data creation unit 13 ... XML form reconstruction unit for return 14 ... Transaction control unit 15 ... Full-text search index generator 2 ... Database section 21 ... Attribute index section 22 ... Data substance part 23 ... Index part for full text search 3 ... XML data search processing unit 31 ... Search request analysis unit 32 ... Search expression generation unit 33 ... Search expression execution unit 34 ... XML data return section 35 ... Full-text search execution unit

Claims (6)

[Claims] 1. An XML data registration processing unit that analyzes XML data for a collection of a plurality of XML data having a schema with a large fixed structure ratio and stores the XML data in a database unit, and a search request provided by a user. XML having a XML data search processing unit that selects XML data satisfying a condition from a collection of XML data using, and at the same time outputs XML data in a form corresponding to a return form designation given by a user at high speed.
An information retrieval system, wherein the XML data registration processing unit analyzes the XML data structure based on the given schema information at the time of XML data registration, and an XML structure analysis result. , "Index data creating means" for creating index information using a fixed data attribute portion in XML, which is necessary to specify a data storage position at the time of search, and a client application for making a search request In order to quickly return the XML data of the configuration required by the server from the server to the client, the return form shaping XML data required for configuring and registering the return XML data at the time of registration is generated according to the definition file. XML form reconstructing means ", and the above XML data, index data, and return form adjustment It has a "transaction control means" for controlling registration of XML data, and the database unit stores and manages the above XML data, index data, and return form shaping XML data. The XML data search processing unit is a client. A search request analysis means for analyzing which search request is transmitted from the database part to determine which element of the database part is to be used; and for searching the database part from the information obtained from the search request analysis means. "Search expression generating means" that constitutes the search expression, and "search expression executing means" that controls the execution of the search expression output from the search expression generating means and searches the database section.
And an XML information retrieval device having "XML data return means" for receiving the retrieval result and controlling the XML data return to the client. 2. The XML information retrieving apparatus according to claim 1, wherein the XML data registration processing unit is capable of performing, in addition to the "index data creating means", retrieval for a portion other than a fixed data attribute portion in XML. The corresponding XML data search processing unit has a "full-text search index data creating means" for generating corresponding full-text search index information, and when the "search request analysis means" receives the search request,
From the schema definition information, determine which of the above-mentioned "index data creation means" or "index data creation means for full text search" to be used,
It is assumed that the processing is distributed, separately from the index search by "search formula execution means"
An XML information search device having "full text search means" for performing a search using the full text search index when the index generated by the "full text search index data creating means" is used. 3. An XML data registration process of analyzing XML data and storing it in a database unit and a search request given by a user for a collection of a plurality of XML data having a schema with a large fixed structure ratio. An XML data search process for selecting XML data satisfying a condition from a collection of XML data using the same and at the same time outputting the XML data in a form corresponding to the return form designation given by the user at high speed.
In the XML data registration process, in the XML data registration process, when the XML data is registered, the structure of the XML data is analyzed based on the given schema information, and “XML structure analysis procedure” and the result of the XML structure analysis. The "index data creation procedure" that creates the index information that uses the fixed data attribute part in XML that is required to specify the data storage location at the time of search, and the client application that makes the search request In order to quickly return the XML data of the required structure from the server to the client, at the time of registration, the XML data for return is created / generated according to the definition file to create the data required for registration. ], The above XML data, index data, and return form shaping XML data In the XML data search processing, a search request sent from a client is analyzed to determine which element of the database section to use. "Search request analysis procedure", "Search expression generation procedure" that configures the search expression for searching the database part from the information obtained in the search request analysis procedure, and the search expression output in the above search expression generation procedure An XML information retrieval method characterized by having a "retrieval expression execution procedure" for performing execution control of the database section and for searching the database section, and an "XML data return procedure" for receiving a search result and controlling XML data return to the client. . 4. The XML information retrieval method according to claim 3, wherein in the XML data registration process, in addition to the “index data creation procedure”, retrieval is also possible for parts other than the fixed data attribute part in XML. In the XML data search process, when the search request is accepted in the “search request analysis procedure”, the “full text search index data creation procedure” for generating the full text search index information is provided.
Determine from the schema definition information which of the above-mentioned "index data creation procedure" or "full text search index data creation procedure" is to be used,
Allocate the processing separately from the index search by "Search formula execution procedure",
An XML information search method characterized by having a "full-text search procedure" for performing a search using the full-text search index when the index generated by the "full-text search index data creation procedure" is used. 5. The XML according to claim 3 or 4.
An execution program for an XML information search method, characterized in that a program for causing a computer to execute the procedure in the information search method. 6. The XML according to claim 3 or 4.
Recording the execution program of the XML information retrieval method, characterized in that the procedure in the method described in the information retrieval method is a program for causing a computer to execute, and the program is recorded in a computer-readable recording medium. Medium.