KR102170738B1 - Method, apparatus and system for transmitting and receiving message - Google Patents

Abstract

The present disclosure relates to a method for transmitting and receiving a message. According to an embodiment of the present invention, a method for transmitting and receiving a message comprises the steps of: extracting element information and content information of a first extensible markup language (XML) file; storing the extracted element information and the extracted content information in an element information table and a content information table, respectively, and generating a second XML file including the element information table and the content information table; filtering the second XML file using a priority table; and generating a third XML file including the filtered element information table and the filtered content information table. Accordingly, messages can be efficiently transmitted in a large network environment.

Description

Method, device and system for sending and receiving messages {METHOD, APPARATUS AND SYSTEM FOR TRANSMITTING AND RECEIVING MESSAGE}

The present disclosure provides a method, apparatus, and system for transmitting and receiving messages.

Since the message transmission and reception process is operated on various platforms, high interoperability is required as a condition of message middleware, and loosely coupled so that the system is not limited by the network configuration and characteristics to which the systems are connected. ) And high scalability characteristics are required to enable support for large-scale participants. According to such message middleware requirements, the publication-subscribe messaging paradigm with high scalability and loose connection-oriented characteristics shows a high degree of suitability, and actual examples of publication-subscription-based message middleware operation in various fields are confirmed.

Currently, publishing-subscription-based message middleware uses topic-based techniques and content-based techniques as message distribution techniques, and many existing XML-based messages with high interoperability and high adaptability are used as message formats. Is being used.

Existing XML message structures in a network environment in which large-scale messages are transmitted/received have a problem that requires a large-scale communication bandwidth. In order to alleviate the problem, the element required instead of the communication of the entire XML data exists. There is a filtering technique that reduces the amount of network traffic by extracting attributes for and deleting unnecessary elements.

However, if the filtering process is performed using the existing XML message data representation technique, the entire XML message parsing process is required, which can cause a problem of increasing the computational overhead of the filtering process. When applying the filtering process, the entire message middleware It may lead to a situation where the performance worsens.

Accordingly, there is a need for a technology for solving problems in an integrated perspective, such as a new message format and filtering technique used in message middleware.

KR 10-1508914 B1 KR 10-1396090 B1

It is to provide a method, apparatus, and system for sending and receiving messages. Further, it is to provide a recording medium in which a program for executing the method in a computer is recorded. The technical problem to be achieved by this embodiment is not limited to the technical problems as described above, and other technical problems may be inferred from the following embodiments.

As a technical means for achieving the above-described technical problem, a first aspect of the present disclosure is, in a method of transmitting and receiving a message, extracting element information and content information of a first XML (eXtensible Markup Language) file ; Storing the extracted element information and the extracted content information in an element information table and a content information table, respectively, and generating a second XML file including the element information table and the content information table; Filtering the second XML file using a priority table; And generating a third XML file including the filtered element information table and the filtered content information table.

In addition, the element information table may provide a message transmission/reception method including at least one of an identifier ID, a total number of child elements of a parent element, and a start index of the content information table.

In addition, a message transmission/reception method may be provided in which the total number of child elements of the parent element is indicated as a negative number and the start index of the content information table is indicated as a positive number.

In addition, the content information table may provide a message transmission/reception method in which the content information is sequentially stored according to the element information table.

In addition, the extracting may include calling an element content storage function; And checking whether a start index of the content information table of the element is duplicated or not.

In addition, calling the content storage function may include recursive calling when the element has child elements; And storing the content information in the content information table when the element does not have child elements.

In addition, the step of checking whether the start indexes overlap may include, if the start indexes overlap, add element information of the overlapping start index to the element information table, and content information corresponding to the overlapping start indexes Not adding to the content information table; And if the start indexes do not overlap, adding element information of the non-overlapping start index to the element information table, and adding content information corresponding to the non-overlapping start index to the content information table. It is possible to provide a method for transmitting and receiving messages.

In addition, the filtering may include checking an element to be extracted using the priority table; Checking a start index of the content information table of the element to be extracted; And extracting the content information corresponding to the start index.

In addition, the filtering step further comprises blocking access to an element other than the element to be extracted by increasing an offset of the element information table when the element to be extracted is not the element to be extracted. Can provide a way.

In addition, the priority table may provide a message transmission/reception method including at least one of a list of elements to be transmitted and received essentially and a list of elements that are not necessarily transmitted/received.

A second aspect of the present disclosure may provide a recording medium in which a program for executing a method according to any one of claims 1 to 10 on a computer is recorded.

A third aspect of the present disclosure is a message transmission/reception apparatus comprising a memory and a processor, wherein the processor extracts element information and content information of a first XML file, and the extracted element information and the extracted content information Are stored in the element information table and the content information table, respectively, generate a second XML file including the element information table and the content information table, filter the second XML file using a priority table, and filter It is possible to provide a message transmission/reception device that generates a third XML file including the element information table and the filtered content information table.

A fourth aspect of the present disclosure is, in a message transmission and reception system, extracting element information and content information of a first XML file, and storing the extracted element information and the extracted content information in an element information table and a content information table, respectively. A publisher that generates a second XML file by doing so, a broker that filters the second XML file using a priority table, and generates a third XML file including the filtered element information table and the filtered content information table, and Including a subscriber receiving the third XML file, the broker may provide a message transmission and reception system for receiving a second XML file from the publisher.

The present disclosure is a method for controlling and controlling information distributed in a large-scale network environment, and can provide a method for expressing in a second XML file composed of an element information table and a content information table, and a method for filtering based on elements. . The XML data representation technique can reduce the amount of network traffic by reducing the size of the data representing the element in the message, and can reduce the filtering computation overhead by being designed to be suitable for element-based filtering.

By reducing the data size of the XML file element, the size of the network traffic can be efficiently reduced. In addition, when the filtering technique is applied, the extraction and deletion of desired element information can be performed without parsing the entire data, which can have an advantage in communication bandwidth through message size reduction in a middleware environment where large-scale messages are transmitted and received, and filtering processing Can proceed quickly.

1 is a flowchart illustrating a method of transmitting and receiving a message according to an embodiment.
2 is a flowchart illustrating steps 110 and 120 shown in FIG. 1.
3 and 4 are exemplary diagrams for describing a first XML file.
5 is an exemplary diagram for explaining steps 110 and 120 shown in FIG. 1.
6 is an exemplary diagram for explaining step 130 shown in FIG. 1.
FIG. 7 is a diagram illustrating a structure in which filtering is applied to the second XML file 630 shown in FIG. 6.
8 is a diagram illustrating a system for transmitting and receiving a message according to an embodiment.
9 is a block diagram of an apparatus for transmitting and receiving a message according to an embodiment.

The terms used in the embodiments have been selected as currently widely used general terms as possible while considering the functions in the embodiments, but this may vary according to the intention or precedent of a technician working in the field, the emergence of new technologies, have. In addition, in certain cases, there are terms arbitrarily selected by the applicant, and in this case, the meaning will be described in detail in the corresponding part. Therefore, the terms used in the present embodiments should be defined based on the meaning of the term and the contents throughout the present embodiments, rather than a simple name of the term.

The present exemplary embodiments may be modified in various ways and may have various forms, and some exemplary embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the embodiments to a specific disclosed form, it is to be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the embodiments. The terms used in the present specification are used only for description of the embodiments, and are not intended to limit the embodiments.

Terms used in the embodiments have the same meaning as commonly understood by a person of ordinary skill in the art to which the embodiments belong, unless otherwise defined. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and in an ideal or excessively formal meaning unless explicitly defined in the present embodiments. Should not be interpreted.

Some embodiments of the present disclosure may be represented by functional block configurations and various processing steps. Some or all of these functional blocks may be implemented with various numbers of hardware and/or software components that perform specific functions. For example, the functional blocks of the present disclosure may be implemented by one or more microprocessors, or may be implemented by circuit configurations for a predetermined function. In addition, for example, the functional blocks of the present disclosure may be implemented in various programming or scripting languages. The functional blocks may be implemented as an algorithm executed on one or more processors. In addition, the present disclosure may employ conventional techniques for electronic environment setting, signal processing, and/or data processing.

In addition, terms including ordinal numbers such as'first' or'second' used in the present specification may be used to describe various elements, but the elements should not be limited by the terms. These terms may be used for the purpose of distinguishing one component from another component.

In addition, the connecting lines or connecting members between the components illustrated in the drawings are merely illustrative of functional connections and/or physical or circuit connections. In an actual device, connections between components may be represented by various functional connections, physical connections, or circuit connections that can be replaced or added.

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

1 is a flowchart illustrating a method of transmitting and receiving a message according to an embodiment.

Referring to FIG. 1, in operation 110, the message transmission/reception apparatus may extract element information and contents information of a first eXtensible Markup Language (XML) file.

XML is translated into an extensible generation language and was proposed by the World Wide Web Consortium (W3C) in 1996. The website building function and search function have been improved compared to HTML, and complex data processing of the client system can be easily performed, and Internet users can easily create and manage content to be added to the web.

The first XML file is a file of an existing XML format, and may include an XML schema and an XML document based on the XML schema. An element is one constituent element constituting an XML file, and may mean tag definition and data for expressing data in the XML file, and Contents may mean a valid value of a defined element. Each XML element may include one or more other elements or attributes, and the XML attribute provides additional information on the XML element and may mean defining the characteristics of the corresponding element. The element information may include, but is not limited to, the number of child elements of the element, the identifier ID of the element, and the start index of the content information table of the element. The content information may mean content that an element has, but is not limited thereto.

In an embodiment, step 110 may include calling a content storage function of an element and checking whether a start index of a content information table of an element is duplicated, which will be described in detail later in FIG. 2.

In step 120, the message transmitting/receiving device may store element information and content information in the element information table and the content information table, respectively, and generate a second XML file.

In an embodiment, the message transmission/reception device may store element information and content information extracted from the first XML file in the element information table and the content information table, and may generate a second XML file.

The element information table may refer to each item of each material that can be identified, such as a table or a picture including information on the extracted element, and the content information table may refer to a table including the contents of the element. 2 The XML file may mean a file including an element information table and a content information table.

The element information table may be stored including an identifier ID (ID), the total number of child elements of the parent element, and a start index of the content information table. The identifier ID is unique for indicating an element, and may include SD, SE, AT, etc., but is not limited thereto. For example, SD may indicate an identifier ID indicating the beginning of a document, SE may indicate an identifier ID indicating an element information item, and AT may indicate an identifier ID indicating an attribute information item.

The start index of the content information table can mean an index indicating the start of the content information of each element in the content information table, and a structure similar to the CSR (Compressed Sparse Row) technique, which is frequently used when compressing and storing graph-type data, is used. I can.

In one embodiment, the total number of child elements of the parent element of the element information table may be expressed as a negative number, and the start index of the content information table may be expressed as a positive number. For example, if the total number of child elements of the parent element is 5 and the start index is 14, it may be displayed as -5 and 14 in the element information table, respectively.

In addition, the content information table may sequentially store content information according to the element information table. For example, if the identifier ID is stored in the element information table in the order of element 1, element 2, element 3, the content information table is stored in the order of content information of element 1, content information of element 2, and content information of element 3 Can be.

By extracting the element information and content information, and storing the element information and content information in the element information table and the content information table to create a second XML file, the size of the first XML file is reduced and information on necessary elements is stored. Can be extracted quickly.

In step 130, the message transmitting/receiving device may filter the second XML file using the priority table. The priority table is information for knowing an element to be extracted, and may include at least one of a list of elements to be transmitted and received essentially and a list of elements that are not necessarily transmitted and received. The priority table may be predefined, and may be created through analysis of the information value of domain experts.

In one embodiment, the message transmitting/receiving device checks the element to be extracted from the second XML file using the priority table, checks the start index of the content information table of the element to be extracted, and corresponds to the start index. Content information can be extracted. Specifically, the start index of the content information table of the element to be extracted from the element information table may be known, and content information corresponding to the start index may be extracted from the content information table.

The size of the content information may be calculated through a start index of the next content information and a current start index value. Accordingly, it is possible to extract or delete content information by directly accessing content information of a corresponding element without repetitive parsing or circulation of the entire information.

In addition, when the message transmission/reception device is not an element to be extracted, the device may block access to an element other than the element to be extracted by increasing an offset of the element information table. For example, by using the priority table, the offset of the element information table can be increased by the number of children of an element other than an element to be extracted. When the element to be extracted is not an element to be extracted, access to unnecessary element information can be reduced by increasing the offset of the element information table, and information on necessary elements can be efficiently extracted.

In step 140, the device for transmitting and receiving a message may generate a third XML file. The third XML file may include a filtered element information table and a filtered content information table. The filtered element information table may refer to a new element information table that stores only information related to the filtered element, and the filtered content information table may refer to a new content information table that stores only information related to the filtered content. have.

In an embodiment, the message transmission/reception apparatus may generate a third XML file including a filtered element information table and a filtered content information table in which the filtered element information and the filtered content information are stored in operation 130.

2 is a flowchart illustrating steps 110 and 120 shown in FIG. 1.

Referring to FIG. 2, steps 110 and 120 shown in FIG. 1 may be performed until they correspond to the last line of the first XML file. Since the element information table and the content information table of FIG. 2 correspond to the element information table and the content information table described in FIG. 1, overlapping contents are omitted.

In the step of extracting the element information and content information of the first XML file (step 110 of FIG. 1), the step of calling the content storage function of the element (step 210) and checking whether the start index of the content information table of the element is duplicated. It may include a step (step 220). The content storage function is a function that stores content information, and may provide element information and content information by being called.

In one embodiment, calling the content storage function (step 210) may include determining whether the element has child elements (step 211).

In step 211, if the element has child elements, the message transmission/reception device makes a recursive call (step 214), and if the element does not have child elements, it may store content information of the element in the content information table (step 212). Specifically, if the element has child elements, the message transmitting and receiving device may return to step 210 by calling the content storage function again, and if the element does not have child elements, it may have content information, so that the content information is stored in the content information table. Can be saved (step 212).

In step 212, the index of the content information table may be increased by storing the content information in the content information table.

In step 220, the message transmitting and receiving device may check whether the start index is duplicated. When the start index of the content information table of an element is duplicated, element information of the duplicate start index may be added to the element information table, and content information corresponding to the duplicate start index may not be added to the content information table. For example, when the start index of the content information table of the SE3 element is duplicated to 90, SE3 and 90 may be added to the element information table, and the content information of SE3 may not be added to the content information table.

In addition, when the start index of the content information table of the element does not overlap, the message transmission/reception device adds element information of the non-overlapping start index to the element information table, and the content information corresponding to the non-overlapping start index is the content information table. You can add new to it. For example, if the start index of the content information table of the SE3 element does not overlap as 90, SE3 and 90 may be added to the element information table, and content information of SE3 may be added to the content information table.

In step 230, the message transmitting and receiving device may store element information in the element information table.

By adding the element information of the duplicate start index to the element information table, the same content information of the content information table can be extracted using the start index, and the content information of the duplicate element is not added to the content information table. You can reduce the size of the file.

The process of extracting and storing element information (step 210, step 220, step 230) and the process of extracting and storing content information (step 211, step 212, step 214) may be performed simultaneously or sequentially. However, it is not limited thereto.

3 and 4 are exemplary diagrams for describing a first XML file.

3 and 4, a first XML file may include an XML schema 310 and an XML schema-based XML document 410. The schema is information used to map a logical database record from a physical device, and a format of the first XML file may be defined through an XML schema.

Assume that the first XML file does not have attribute values except for the root element, and can be expressed as child elements and content information values, and that only one schema is applied to one first XML file. do. The root element may mean the top element of the first XML file.

In FIG. 3, the root element of the XML schema 310 is "TDLMessage", the parent element is "SurfaceTrack", and the number of child elements for the parent element is 5; "WordFormat", "Course", "Speed", "Latitude", "Longitude" can be a child element.

In FIG. 4, the XML schema-based XML document 410 may mean that a file to be distributed is created as an XML schema-based XML document, and when the file is distributed in the system, the XML document 410 according to the XML schema definition You can exchange files that can be verified to ensure interoperability by writing.

In Fig. 4, the root element is "TDLMessage", the attribute value of the root element is "http://www.w3.org/2001/XMLSchema-instance", the parent element is "SurfaceTrack", and the content of the child element "WordFormat" The information is "1111", the content information of the child element "Course" is "East", the content information of the child element "Speed" is "150", the content information of the child element "Latitude" is "17.124", and Content information of the element "Longitude" may be 13.52.

5 is an exemplary diagram for explaining steps 110 and 120 shown in FIG. 1.

Referring to FIG. 5, the apparatus for transmitting and receiving a message may generate a second XML file 540 from a first XML file 510 and 520 through an information extraction structure 530. The XML schema 510 of FIG. 5 corresponds to the XML schema 310 of FIG. 3, and the XML schema-based XML document 520 of FIG. 5 corresponds to the XML schema-based XML document 410 of FIG. 4, The second XML file 540 of FIG. 5, the element information table 550, the content information table 560, the identifier ID 551, and the start index 553 of the content information table are the second XML file described in FIG. 1, Since it corresponds to the element information table, the content information table, the identifier ID, and the start index of the content information table, duplicate contents are omitted.

The information extraction structure 530 may be performed by the steps shown in FIG. 2. The information extraction structure 530 may be composed of extracted element information and content information. The information extraction structure 530 may represent element information and content information in the first XML files 510 and 520 including the XML schema 510 and the XML schema-based XML document 520 by using an identifier ID.

In one embodiment, the information extraction structure 530 may represent element information and content information by using an identifier ID used in EXI (Efficient XML Interchange). SD (Start Document) may mean the start of a document, SE means an element information item, AT means an attribute information item, CH means a character information item, and EE means an end element.

For example, in the information extraction structure 530, the "TDLMessage" of the XML document 520 based on the XML schema is referred to as SE1, the "xmlns:xsi~" is AT1, the "xsi:noNamespace~" is AT2, and the "SurfaceTrack "" may be composed of SE2, "WordFormat" may be composed of SE3, "Course" may be composed of SE4, "1111" may be composed of SE3 CH, and "EAST" may be composed of SE4 CH.

The element information and content information extracted through the information extraction structure 530 may be stored in the element information table 550 and the content information table 560, respectively. The element information table 550 may include an identifier ID 551, a total number of child elements 552 of a parent element, and a start index 553 of the content information table 560.

In the element information table 550, the identifier ID 551 may correspond to SD, SE1, AT1, AE2, SE2, SE3, and SE4, and the identifier ID 551 may be in a 4-byte format, but is not limited thereto. The total number of child elements 552 of the parent element may correspond to -5, and may be expressed as a negative number in a 4 byte format. The start index 553 of the content information table 560 may be 0, 4, etc., and may be in a 4 byte format. In addition, the start index 553 of the content information table 560 may be expressed as a positive number to distinguish it from the total number of child elements 552 of the parent element, but is not limited thereto.

In one embodiment, the message transmitting/receiving device may add duplicate element information to the element information table 550 when duplicate element information exists, and add content information of the duplicate element to the content information table 560 I can't. For example, when element SE3 is duplicated, element information of SE3 may be added to the element information table 550, and content information of SE3 may not be added to the content information table 560. The content information table 560 may sequentially store content information according to the order of element information in the element information table 550.

6 is an exemplary diagram for explaining step 130 shown in FIG. 1.

Referring to FIG. 6, the apparatus for transmitting and receiving a message may filter the second XML file 630 using the priority table 620. The XML schema-based XML document 610 and the second XML file 630 of FIG. 6 correspond to the XML schema-based XML document 520 of FIG. 5 and the second XML file 540 of FIG. Content is omitted.

In the XML schema-based XML document 610, child elements of "data" are "Image", "Text", "imgbody", "photo", and "body", and child elements of "Image" are "imgbody", "photo", the child element of "Text" is "body", the parent elements of "imgbody" and "photo" are "Image" and "data", and the parent element of "body" is "Text", "data It can be seen that "is", and the parent elements of "Image" and "Text" are "data".

In one embodiment, the message transmission/reception device may check the element to be extracted using the priority table 620. For example, it may be confirmed that an element to be extracted from the first XML file including the XML schema-based XML document 610 is a "body" element in the priority table 620. The priority table 620 is predefined and may include a list of elements to be transmitted/received essential or a list of elements that are not necessarily transmitted/received, and may be created through information value analysis of domain experts.

In addition, the message transmission/reception apparatus may check the start index of the content information table 650 of the element to be extracted from the element information table 640 and extract the element information to be extracted. For example, the SE 641 of the element information table 640 is the identifier ID of the "Image" element, the SE 642 is the identifier ID of the "Text" element, and the SE 643 is the identifier of the "body" element. It may mean an ID, and the total number of child elements 644 of the "Text" element is -1, and the start index 645 of the content information table 650 of the "body" element to be extracted is 90. I can confirm.

The message transmission/reception device may extract content information of the content information table 650 corresponding to the start index 645. For example, when the start index 645 is 90, the content information table 650 may directly access the place 651 having the index 90 to extract the content information "hello" of the "body" element.

In an embodiment, if the element to be extracted is not an element to be extracted, the message transmission/reception device may block access to an element other than the element to be extracted by increasing an offset of the element information table 640. For example, if the element to be extracted is "body", the offset of the element information table 640 as many as the number of children of the element other than "body" may be increased to move to the SE 642.

The message transmitting/receiving apparatus may extract element information and content information efficiently by extracting only the element to be extracted using the priority table 620, and reduce access to unnecessary information.

FIG. 7 is a diagram illustrating a structure in which filtering is applied to the second XML file 630 shown in FIG. 6.

Referring to FIG. 7, the third XML file 720 may include a filtered element information table 721 and a filtered content information table 722. The second XML file 710, the element information table 711, and the content information table 712 of FIG. 7 are in the second XML file 630, the element information table 640, and the content information table 650 of FIG. Since they correspond, the overlapping content is omitted.

In an embodiment, the element information table 711 and the content information table 712 are filtered using a priority table, and the filtered element information and content information, the filtered element information table 721 and the filtered content information table 722 ) Can be saved. For example, information of an element to be extracted from the element information table 711 may be stored in the filtered element information table 721, and "hello", which is the content information of the element to be extracted from the content information table 712, is It may be stored in the filtered content information table 722.

The message transmission/reception device may generate a third XML file 720 including the filtered element information table 721 and the filtered content information table 722. By storing only the element information and content information filtered in the second XML file 710 to the third XML file 720, the size is small and communication overhead can be reduced.

8 is a diagram illustrating a system for transmitting and receiving a message according to an embodiment.

Referring to FIG. 8, the message transmission and reception system may include a publisher 810, a broker 820 and a subscriber 830. The first XML file 811, the second XML file 812, and the third XML file 813 of FIG. 8 correspond to the first, second, and third XML files described in FIG. Content is omitted.

The message transmission/reception system may refer to a message middleware system, the publisher 810 refers to a configuration that generates a specific event, the subscriber 830 refers to a configuration that receives a specific event, and the broker 820 May mean a bus that mediates the publisher 810 and the subscriber 830.

In one embodiment, the publisher 810 of the message transmission/reception system extracts element information and content information of the first XML file 811, and stores the extracted element information and content information in the element information table and the content information table, respectively. A second XML file 812 may be generated. For example, the publisher 810 may encode the first XML file 811 into the second XML file 812. Encoding refers to extracting the element information and content information of the first XML file 811 from the first XML file 811 and converting them into a second XML file 812 stored in the element information table and the content information table, respectively. Yes, and the publisher 810 may include an XML schema, but is not limited thereto. The schema is information used to map a logical database record from a physical device, and a format of the first XML file may be defined through an XML schema.

The broker 820 of the message transmission/reception system may filter the second XML file 812 using the priority table, and generate a third XML file including the filtered element information table and the content information table. For example, the broker 820 may receive and filter the second XML file 812 from the publisher 810 and generate a third XML file. The broker 820 may have the same XML schema as the publisher 810 and may have a predefined priority table. An element to be extracted can be known using the priority table, and the priority table may include a list of elements to be transmitted/received essential or a list of elements that are not necessarily transmitted/received.

Also, the subscriber 830 of the message transmission/reception system may receive the third XML file 813 and may decode it according to the needs of the subscriber 830. Decoding may mean that the subscriber 830 receives the third XML file 814 and converts it into a filtered first XML file. The subscriber 830 may have the same XML schema as the publisher 810.

9 is a block diagram of an apparatus for transmitting and receiving a message according to an embodiment.

Referring to FIG. 9, the message transmission/reception apparatus 900 may include a memory 910 and a processor 920. In the message transmitting/receiving apparatus 900 shown in FIG. 9, only components related to the embodiment are shown. Therefore, it can be understood by those of ordinary skill in the art that other general-purpose components may be further included in addition to the components illustrated in FIG. 9.

The memory 910 is hardware that stores various types of data processed in the message transmission/reception device 900. For example, the memory 910 may store an element information table, a content information table, a content storage function, and a priority table. The memory 910 includes a random access memory (RAM) such as dynamic random access memory (DRAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), and CD- ROM, Blu-ray or other optical disk storage, hard disk drive (HDD), solid state drive (SSD), or flash memory.

The processor 920 performs an overall function for transmitting and receiving messages, as described above in FIGS. 1 to 8.

In one embodiment, the processor 920 extracts element information and content information of the first XML file, stores the extracted element information and content information in the element information table and the content information table, respectively, and the element information table and the content information A second XML file including a table may be generated. In addition, the processor 920 may check the start index of the content information table of the element to be extracted from the second XML file by using the priority table, extract content information corresponding to the start index, and filter element information A third XML file including a table and a content information table may be generated.

The present embodiments may also be implemented in the form of a recording medium in which a program such as a program module executed by a computer is recorded. Computer-readable media can be any available media that can be accessed by a computer, and includes both volatile and nonvolatile media, removable and non-removable media. Further, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes computer readable instructions, data structures, other data in a modulated data signal such as program modules, or other transmission mechanisms, and includes any information delivery media.

Further, in the present specification, the "unit" may be a hardware component such as a processor or a circuit, and/or a software component executed by a hardware configuration such as a processor.

The foregoing description of the present specification is for illustrative purposes only, and those of ordinary skill in the art to which the content of the present specification belongs will understand that it is possible to easily transform it into other specific forms without changing the technical spirit or essential features of the present invention. I will be able to. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The description of the above-described embodiments is merely exemplary, and those of ordinary skill in the art will understand that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true scope of protection of the invention should be determined by the appended claims, and all differences in the scope equivalent to the content described in the claims should be construed as being included in the scope of protection defined by the claims.

310: XML Schema 410: XML Document based on XML Schema
510: XML Schema 520: XML Document based on XML Schema
530: information extraction structure 540: second XML file
550: element information table 551: identifier ID
552: total number of child elements of the parent element 553: starting index
560: Content information table 610: XML document based on XML schema
620: priority table 630: second XML file
640: Element information table 641: Identifier ID of "Image"
642: Identifier ID of "Text" 643: Identifier ID of "body"
644: total number of child elements of "Text" 645: starting index of "body"
650: content information table 651: where the starting index is 90
710: second XML file 711: element information table
712: content information table 720: third XML file
721: filtered element information table 722: filtered content information table
810: publisher 811: first XML file
812: second XML file 813: third XML file
814: first XML file to which filtering is applied 820: broker
830: subscriber 900: message sending and receiving device
910: memory 920: processor

Claims (13)

In the method of transmitting and receiving a message,
Extracting element information and content information of a first XML (eXtensible Markup Language) file;
Storing the extracted element information and the extracted content information in an element information table and a content information table, respectively, and generating a second XML file including the element information table and the content information table;
Filtering the second XML file using a priority table; And
Generating a third XML file including the filtered element information table and the filtered content information table; Including,
The element information table,
A message transmission and reception method comprising at least one of an identifier ID, a total number of child elements of a parent element, and a start index of the content information table. delete The method of claim 1,
The total number of child elements of the parent element is indicated by a negative number, and the start index of the content information table is indicated by a positive number. The method of claim 1,
The content information table,
The content information is sequentially stored according to the element information table. The method of claim 1,
The extracting step,
Calling an element content storage function; And
Including, checking whether the start index of the content information table of the element overlaps. The method of claim 5,
Calling the content storage function,
Calling recursively when the element has child elements; And
And storing the content information in the content information table when the element does not have child elements. The method of claim 5,
The step of checking whether the starting index is duplicated,
If the start indexes overlap, adding element information of the overlapping start index to the element information table, and not adding content information corresponding to the overlapping start index to the content information table; And
If the start index does not overlap, adding element information of the non-overlapping start index to the element information table, and adding content information corresponding to the non-overlapping start index to the content information table; including; How to send and receive messages. The method of claim 1,
The filtering step,
Identifying an element to be extracted by using the priority table;
Checking a start index of the content information table of the element to be extracted; And
Extracting the content information corresponding to the start index; Containing, message transmission and reception method. The method of claim 8,
The filtering step,
If the element is not the element to be extracted, blocking access to the element other than the element to be extracted by increasing an offset of the element information table; further comprising, a message transmitting and receiving method. The method of claim 1,
The priority table,
A message transmission and reception method comprising at least one of a list of elements to be transmitted and received essentially and a list of elements that are not necessarily transmitted and received. A recording medium recording a program for executing the method according to any one of claims 1 and 3 to 10 on a computer. In the message transmission and reception device,
Memory; And
Including; a processor;
The processor,
Extracting element information and content information of the first XML file,
Store the extracted element information and the extracted content information in an element information table and a content information table, respectively, and generate a second XML file including the element information table and the content information table,
Filtering the second XML file using a priority table,
Create a third XML file including the filtered element information table and the filtered content information table,
The element information table,
A message transmitting and receiving device comprising at least one of an identifier ID, a total number of child elements of a parent element, and a start index of the content information table. In the message transmission and reception system,
A publisher who extracts element information and content information of a first XML file, stores the extracted element information and the extracted content information in an element information table and a content information table, respectively, to generate a second XML file;
A broker that filters the second XML file using a priority table and generates a third XML file including the filtered element information table and the filtered content information table; And
Including; a subscriber receiving the third XML file,
The broker receives a second XML file from the publisher,
The element information table,
A message transmission/reception system comprising at least one of an identifier ID, a total number of child elements of a parent element, and a start index of the content information table.

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