KR19990042073A - Document exchange system and method through MSI encapsulation of SMG document and object - Google Patents

Abstract

The present invention relates to a document exchange system and method for effectively delivering an SGML document and an external entity referred to by the SGML document to another system through communication. The sending system interprets the SGML document composed of the structural system, finds out the conditions necessary for MIME composition, assigns identifiers that can be distinguished in the MIME message, and enables effective transmission. The receiving system converts the location information of the object required by the SGML document according to the receiving system's environment through the recognition and interpretation of the received MIME message so that the SGML editor can guarantee the consistency of data in the same or heterogeneous system environment. It consists of a system that allows the operation to take place. The MIME-SGML system according to the present invention reduces the data transmission cost incurred during transmission by transmitting a single MIME type for each declaration referred to each SGML document and each entity referred to, and is suitable for other types of systems. By constructing the SGML document, the portability of the SGML document is increased, and the SGML document used by the SGML editor or the browser and the object information referred to by the SGML document are accurately delivered to the user.

Description

Document exchange system and method through MSI encapsulation of SMG document and object

The present invention is to compensate for the drawback that the object referenced by the SGML document cannot be used as accurate information in the received system when the SGML (Standard Generalized Markup Language; abbreviated as SGML) document is transferred to another system and used. The present invention relates to a method for constructing and using an object list related to an SGML document, an SGML document, and an external entity used by the SGML document, and using information suitable for the environment of a received system.

In general, MIME (Multipurpose Internet Mail Extention, hereinafter referred to as MIME) -SGML scheme, which is a part of document exchange system, refers to standardized document delivery based on MIME communication protocol and SGML document attached thereto. It is used as the base technology of e-commerce as a transmission method to external entities.

The existing MIME-SGML system focused only on the document exchange centered on the mail environment. This demanded a new method for the environment of the system according to the change of the environment of the system that handles the SGML document, and a method of delivering the SGML document that is guaranteed to be consistently acceptable in all systems. In particular, when using the general-purpose SGML interpreter that interprets and processes all SGML document formats, there is a need for a method in which SGML objects referenced by SGML documents are delivered to and used by the receiving system rather than the formats related to SGML documents.

In addition, the transmission of the object related to the conventional SGML document is composed of a system dependent on the infrastructure for document exchange, and the basis for the transmitted objects to be universally used is weak, resulting in excessive transmission costs, and It resulted in data deficiency that occurred, and also could not deliver accurate information quickly.

The SGML object list for object management of SGML documents used in the SGML system is provided to the user along with the SGML documents when the SGML parser is executed. The SGML object list structure has the name of the object, the type of the object, and the location information of the object according to the type of the object. The list of SGML objects used by SGML documents cannot provide information about external objects referenced by SGML documents when the environment of the system changes.

To solve this problem, the SGML entity list should have information about the appropriate entity so that it can be interpreted in the changed system environment. Therefore, the generation of the object list used by the SGML document must create a new transmission list for transmission and modify the information referenced by the SGML document itself. In addition, the MIME message for the changed system environment has information about the object identifiers assigned to each encapsulated SGML object and the corresponding content identifier.

In the present invention, since the generated MIME message is a file composed of a large amount of data due to the characteristics of the SGML document, the object delivery of the SGML document is quick and accurate by interfacing the SGML document and the object list with communication constraints in a way to reduce the transmission cost. To achieve. In addition, the receiving system recognizes the received MIME message, interprets the object list, and selects the target location where the object should be located, and suggests a method for converting the external reference information in the SGML document itself into the environment of the new receiving system.

When transferred to another system and used, if the SGML document does not refer to the object it refers to, it may not be possible to obtain the desired information. Therefore, SGML documents and objects through MIME are delivered to the receiving system and the SGML documents and objects in the receiving system's environment are used for the quick and accurate interface that is not restricted by mail, web, FTP, etc. for object transmission of these SGML documents. The main purpose is to make them available.

The first object of the present invention is to configure the transmission object list by generating a transmission object identifier suitable for the environment of the transmission target system by analyzing the SGML document and the object list information SGML parser,

A second object of the present invention is to generate a message by encapsulating an SGML document and an object file by a MIME type in order to quickly and accurately transmit information by tracking the object by interpreting the configured object list.

A third object of the present invention is to extract the object list and SGML document to be transmitted from the received MIME message and to provide the location information suitable for the environment of the receiving system by using the location information stored in the object list.

1 is a complete system diagram for the transmission of the SGML document and related entities of the present invention.

2 is a schematic conceptual diagram of hardware capable of communicating between systems of the present invention.

3 is a general flow diagram for SGML entity transmission in accordance with the present invention.

4 is a flowchart in which an SGML parser according to the present invention receives an SGML document and object list information as an input and interprets the extracted object.

5 is a flowchart in which an SGML parser according to the present invention parses an SGML document and an entity list to generate an entity list that can be transmitted.

Figure 6 is a flow chart for generating and transmitting one entity transfer list after tracking the location of the entity by analyzing the transfer object list according to the present invention.

7 is a flowchart for analyzing and storing an entity transmission list in a receiving system according to the present invention to separate and store entities.

<Explanation of symbols for main parts of the drawings>

11: transmitting side SGML parser 12: packer

13: MIME-SGML sender 14, 15: communication interface

16: MIME-SGML Recipient 17: Unpacker

18: receiving side SGML parser 21: transmitting system

22: receiving system

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is an overall system configuration diagram for transmitting an SGML document and related entities according to the present invention. As shown in FIG. 1, a transmission system for transmitting an SGML document and entities through a MIME, and a received MIME message, recognizes an SGML document. It consists of a receiving system that extracts the object list,

The transmission system, the SGML document and the SGML list analysis, the sender SGML parser 11 that performs the SGML list analysis, and the MIME item for each object by extracting the transmission object name according to the result of the parser, creating the list and tracking the object A MIME-SGML sender 13 for transmitting a file by configuring a MIME name based on an MIME item for each object and composing a MIME message, and transmitting the sender's file on a communication protocol. It consists of a communication interface 14 connected to the.

The receiving system that receives the file transmitted from the transmitting system includes a communication interface 15 for connecting on a communication protocol, a MIME-SGML receiver 16 for recognizing a MIME message in the received file, and a receiver thereof. The unpacker 17 analyzes the received MIME message, sets the system environment to match the environment of the receiving system, extracts the object name, locates and outputs the object, and the information interpreted by the unpacker 17. It consists of a receiving SGML parser 18 that constructs an SGML document, an SGML object, and an SGML entity list file to refer to the entities at the location of the system to which the SGML document refers.

2 is a conceptual diagram illustrating a hardware specification of a system for transmitting an SGML document and related entities according to the present invention, wherein a transmission system and a reception system are connected to a communication network through a communication board to exchange files. A workstation is used, and the receiving system can use a workstation or a PC.

3 shows the overall flow according to the system of FIG. 1. The transmission system drives the SGML parser 11 (3-1), inputs the SGML document and the object list referenced by the SGML document (3-2), and transmits the object name to be transmitted through the object name interpretation (3-3). Extract it (3-4). Generate the MIME type of the object name found (3-5).

According to the method for generating the MIME type of the entity name, a content identifier in consideration of the relationship between SGML objects is assigned. The form of the content identifier is configured in the order of <object name. System date. System name. Domain name>. In fact, the identifier assigned to the object converts the identifiers of the objects referenced in the SGML document into MIME content identifiers. At this time, the SGML parser 11 undergoes a filtering process on the premise of classifying the transmission object and the non-transmission object in the name filtering and separation step 4-2 of the object to be transmitted in FIG. 4, and the found object is MIME by the packer 12. Insulation rules with configuration items are used to map MG messages by mapping them to SGML objects (3-6).

Since MIME messages to be transmitted contain information generated on a large scale due to the characteristics of SGML documents, compression is performed to construct a message that meets the constraints of the communication system for transmission (3-7).

The MIME-SGML sender 13 of the transmission system loads a message composed of the MIME type into the communication protocol via the communication interface 14 to predict the error and data loss on the communication line to the destination system (3-8). ).

The MIME-SGML receiver 16 of the receiving system decodes the MIME message (3-9) and decompresses the message (3-10), and the external object referred to by the SGML document and SGML document in the message by the unpacker 17. To unpack them. The performed unpacker interprets the received MIME message and extracts the objects (3-11), and performs the output by positioning the objects through the analysis of the extracted object transmission list (3-12).

Objects to be transported are external files and system resources that are referenced to represent one complete SGML document within an SGML document.

4 is a process of filtering a non-transmission object and a transmission object according to the information of the SGML object list, and the method of separating them is as follows.

First, the SGML document is input (4-1), and the name of the object to be transmitted of the SGML document is separated into a filtering object and a non-transmission object (4-2). The method for separating the object to be transmitted and the object to be transmitted is determined by the following set.

Complete set of SGML documents (P) ⊃ Set of destination objects (q) ∪ Set of non-delivery objects (r) 집합 Set of locations of objects (s)

All you need is the object to be transferred and its location, so you only need q ∩ s.

Since only q ∩ s should be selected under a set s ⊂ q or s ⊂ r work condition,

q ∩ s = P-((q ∪ r)-r) or (q ∩ r ∩ s) ------ (Eq. 1)

According to Equation (1), only the subject to be transmitted can be selected.

This method generates a separate object list for tracking the location of the object through the object name extracted by the SGML parser.

FIG. 5 is a flowchart of generating a list using the object names of transmission objects extracted by the method of FIG. 4 and passing them to the interface input of a packer for enabling object tracking.

First, run the SGML parser (5-1), input the SGML document (5-2), and receive the external reference entity name (5-3) to determine whether it is the object name to be transferred (5-4). To perform. If it is not the name of the object to be transmitted, repeating the SGML document input step (5-2) until the object name of the object is checked, and extracting the object name of the object (5-5), if it is the name of the object to be transmitted. Then, create the object list (5-6). Then, it is determined whether it is the end of the SGML document (5-7), and iterates from the document input step 5-2 until the end of the document, and ends if the end of the document.

FIG. 6 illustrates a method in which a packer analyzes information stored in an object tracking list through input of an object to be transmitted to configure a MIME content identifier.

The packer is driven (6-1), receives the transfer object list (6-2), and checks whether it is the end of the object list (6-3).

If not at the end of the object list, the packer performs steps (6-4) to track the actual SGML external objects contained in the object to be sent, and the object at the tracked location is stored in the external MIME entry table (6- Perform step (6-6) to confirm whether the individual registered in 10).

If the identified object exists in the MIME item through the checking step (6-5), the registered object is given a name registered in the MIME item (6-7), and an arbitrary object is present for the object that does not exist in the MIME item table. The reserved word is designated and given a new random name (6-6). It then scans the information where the actual object is located (6-8) and adds it to the MIME message (6-9).

The rules for mapping SGML objects and MIME content identifiers that are encapsulated in constructing SGML documents and objects into MIME messages are as follows.

First, we use the MIME content type for SGML expressions.

Second, the SGML system identifier is a MIME content-ID

Third, <formula, data> composing SGML data object is in the form of <content type, body> of the MIME body part.

Fourth, SGML text object <order of characters> is MIME text / SGML body part <order of characters>.

Fifth, SGML documents are composed of multipart / SGML body parts.

In this way, each content identifier is given a reserved word for distinguishing the object, and the object scan 6-8 performs an object scanning operation to add the object referred to by the actual SGML document to the body. Generation of the MIME content identifier and scanning of the object are terminated by the end of the list of the object to be transmitted, and then compression is performed on the actually generated MIME message (6-11). By driving (6-12) the MIME sender involved in the actual transmission process of the transmission system, selecting (6-13) and loading (6-14) the protocol for MIME transmission and transmitting (6-15), It plays the last role of the sending system.

7 is a method for a receiving system to recognize a MIME message received from a transmitting system and to operate in an environment of the receiving system. The unpacker module is driven 7-1 and the MIME message containing the received SGML entity is recognized (7-2). Subsequently, the MIME message is decompressed (7-3), and the object list is found (7-4) by scanning the object list in the transmitted MIME message (7-5). It checks whether the end of the object list is the last (7-6), and if not, interprets the MIME message (7-7), and designates the location (7-8) to check whether the location information exists (7-9). If the location information exists, the existing location is assigned (7-10). If the location information does not exist, the new location information is given (7-11), and the object list becomes the last by the object list scan (7-5). Repeat the above process until the end of the list.

Here, since the object list to be transmitted has information on the object reference referred to by the SGML document of the receiving system, the names of the objects referring to the external objects in the SGML document itself extracted first and then extracted from the MIME message are included. Used to switch to location information. According to the interpretation of the MIME type, the object list related to the SGML document is also modified with the location information of the receiving system, and the location specified by the name of the object is found. In the process of selecting location, any object whose object does not exist among the object names included in the object list to be transmitted is used by using the resources of the receiving system.

As described in detail above, according to the present invention, the SGML document and the objects are transferred to the receiving system through MIME so that a quick and accurate interface is achieved for the object transmission of the SGML document. By enabling the use of SGML documents and entities in the environment of the receiving system, the object delivery of SGML documents is quick and accurate, and communication costs can be reduced.

In addition, when transferred to another system, the SGML document can refer to the object referenced, so that the desired information can be obtained accurately.

In addition, it is possible to establish EDI (Electronic Data Interchange) based technology for standardized document exchange, to exchange standard SGML data in client / server environment, and to enable SGML document exchange in web environment. There is.

Claims (8)

Sender SGML parser 11 for SGML document and SGML list interpretation, SGML list interpretation, and packer that organizes them into MIME items by object through extracting object names, creating lists and tracking objects according to the parser results. 12), a MIME-SGML sender 13 for constructing a MIME name based on an MIME item for each object, and for constructing a MIME message to transmit a file, and a communication interface for connecting the sender's transfer file on a communication protocol. 14, the transmission system is configured, A communication interface 15 connected on a communication protocol, a MIME-SGML receiver 16 that recognizes a MIME message in a received file, and a MIME message received through the receiver to interpret the MIME message to fit the environment of the receiving system. The SGML document, the SGML object, and the SGML object list file are constructed using the unpacker 17 which sets the system environment, extracts the object name, locates and outputs the information, and the information interpreted by the unpacker 17. A document exchange system via MIME encapsulation of an SGML document and an object, characterized in that the receiving system comprises a receiving SGML parser (18) for referencing the objects at the location of the referencing system. In the SGML document transmission and reception method of a document exchange system for transmitting and receiving the SGML document and external objects referenced by the SGML document, Transmission system Receiving an SGML document and a list of objects referred to by the SGML document by driving the SGML parser; Extracting the object name to be transmitted by resolving the object name from the received document and object list; Constructing a MIME message by generating a MIME type of the found object name; Compressing the MIME message and loading it into a communication protocol through a communication interface to transmit the message; The receiving system Identifying and decompressing the MIME message through the MIME-SGML receiver of the receiving system; Extracting the objects by interpreting the received MIME message to interpret the SGML document and the external objects referenced by the SGML document through the unpacker; A method for exchanging documents through MIME encapsulation of SGML documents and objects, characterized in that the steps of separating and storing the objects are performed. The method of claim 2, wherein the MIME message construction step of the transmission system, According to the method of generating the MIME type of the entity name, a content identifier considering the relation between SGML objects is assigned. The format of the content identifier is in the following order: <object name. System date. System name. Domain name>. The identifier assigned to the object converts the identifiers of the objects referenced in the SGML document into MIME content identifiers. A method for exchanging documents through MIME encapsulation of SGML documents and objects, characterized in that the packer maps the SGML object through an encapsulation rule with an MIME configuration item to form a MIME message. The method of claim 2, wherein the extracting of the entity to be transmitted of the transmission system comprises: The name of the object to be sent in the SGML document is separated into filtering and sending and non-sending objects. Complete set of SGML documents Send To Object Set (q) Non-Sent Object Set (r) Given the set of positions of the object (s), q s s = P-((q) r)-r) or (q ∩ r s s) SGML documents and objects exchange method through MIME encapsulation, characterized in that it selects only the object to be sent. . 3. The method of claim 2, wherein generating a list of entities to be transmitted of the transmission system is The object of the SGML document is compared with the external reference object name to determine whether it is a transfer object name, and in the case of the transfer object name, an object list is generated by extracting the transfer object name. How to exchange documents through MIME encapsulation. The method of claim 5, wherein the step of creating an entity transmission list of the transmission system, Driving the packer, receiving a list of the object to be sent and checking whether it is the end of the object list, If not at the end of the object list, the packer will track the actual SGML external objects contained in the object to be sent, Checking whether the object at the tracked position is an object registered in an external MIME item table; If the object exists in the MIME item: Giving a name registered in the MIME item and assigning a new random name by specifying a reserved word for an object that does not exist in the MIME item table; A method of exchanging documents through MIME encapsulation of SGML documents and objects, comprising: performing a step of scanning the information on which the actual object is located and adding the MIME message after assigning a name. 7. The method of claim 6, wherein the rules for the mapping between the SGML object and the MIME content identifier that are encapsulated in constructing the SGML document and the objects into a MIME message include: First, we use the MIME content type for SGML expressions. Second, the SGML system identifier is a MIME content-ID Third, <formula, data> composing SGML data object is in the form of <content type, body> of the MIME body part. Fourth, SGML text object <order of characters> is MIME text / SGML body part <order of characters>. Fifth, the SGML document is a document exchange method through MIME encapsulation of SGML documents and objects, characterized in that composed of multi-part / SGML body parts. The method of claim 2, wherein the extracting of the entities by interpreting the MIME message of the receiving system comprises: Parsing the decompressed MIME message to find a list of the object to be transmitted in the received MIME message and scanning the object list; Parsing the MIME message while checking whether it is the end of the object list, checking whether the location information exists by specifying a location, If the location information exists, the existing location is assigned, and if the location information does not exist, the process of assigning the new location information is repeated until the end of the object list. Document exchange method through MIME encapsulation of SGML documents and objects.