JPH10171704A - Display device for hyper-text data - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to change data arrangement on a network node in each node without exerting influence upon other nodes and to reduce labor for the additional updating processing of final information by registering a data identifier(ID) corresponding to data to be linked in hyper-text data in a data management table in its node and specifying a corresponding URL linked address in optional data. SOLUTION: A local resource retrieving part 40 extracts data ID from a link tag received from a link tag detection part 20 and judges whether data corresponding to a resource indicated by the link tag exists in a local resource or not by referring to a data management table. When the data exist, a link substitution part 30 rewrites a part corresponding to the extracted link tage in hyper-text data so as to point out the local resource. A hyper-text data display control part 50 controls a network control part 60 or a local resource control part 70, acquires necessary data and displays the data on a display device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hypertext data display device for displaying various data used in hypertext, and more particularly, to hypertext data displayed in a document by linking to data distributed on a network. It relates to a display device.

[0002]

2. Description of the Related Art As a conventional hypertext data display device of this kind, there is, for example, a device disclosed in Japanese Patent Laid-Open Publication No. Hei 3-4354. This publication describes a distributed processing system in which a plurality of nodes (hypertext display devices) are connected via a network. Referring to FIG. 4, in each node on the distributed processing system, information for determining the content of the information stored in the file 106 of the node is stored in the file 104, and
04 is displayed on the search terminal via the data search program 105. If the node-by-node information determination program 107 determines that the final information is not present in the node, under the control of the operating system 113,
The network control program 110 refers to the node management table 109 and sends a final information transfer request to another node in which necessary final information is stored. The transferred final information is stored in the file 104 and displayed on the search terminal device.

As another example of a conventional hypertext data display device, a document "RFC1886, Hyper"
rtext Markup Language (HTM
L), Internet Engineering T
HTM disclosed in "ask Force (IETF)"
There is an L display device. The HTML described in the document provides a hyperlink in which a pointer for tracing a link to other data is embedded in the hypertext data.

[0004] In HTML, as a hyperlink method, an anchor and an inline image are used. The anchor designates a pointer of a link destination for the link source object in the HTML data.
The link destination of the anchor indicates a pointer of HTML and arbitrary data such as an image or a text by “<A HREF =”.
pointer "> object <// A>". A pointer of arbitrary data is described in a character string pointer, and an arbitrary character string is described in a character string object, and a description for specifying a display object such as an inline image is performed. HTM for display device
When the operator performs an operation of selecting a link source object designated as an anchor while the L data is displayed, the display device accesses data at a link destination of the anchor and performs a process according to the type of data.

On the other hand, in the case of an in-line image, a pointer of linked image data is set in HTML data by "<IMG".
SRC = “image”> ”.
A pointer to image data is described in the character string image. In an inline image, image data designated when displaying HTML data is incorporated in the display as one image in a page.

[0006] In HTML, as a method of describing a pointer to data, a document "RFC1738, Uni" is used.
form Resource Locators (UR
L), Internet Engineering T
Ask Force (IETF) ". Therefore, in the URL, a pointer to the hypertext data can be described together with information on the node where the data is located. Using the URL, data referred to in the hyperlink data is uniquely determined on the network. Therefore, the target data can be reached by sequentially following the link indicated by the URL in the hyperlink data.

[0007]

However, the conventional hypertext display device described above has the following disadvantages.

In the technique disclosed in Japanese Patent Laid-Open Publication No. Hei 3-4354, it is necessary to centrally manage the node management tables distributed on the information distribution processing system. In addition, since the final information actually arranged on each node and the contents of the node management table must always be consistent, every time new final information is added to any node, all nodes The upper node management table needed to be updated. For this reason, there is a problem that the process of adding and updating the final information becomes complicated.

In the prior art using HTML, data is accessed via a network in accordance with the description of a URL that uniquely defines all data embedded in the hyperlink data itself on the network.
The problem that the process of adding and updating data relating to the update of the node management table, which has been a problem in the prior art disclosed in Japanese Patent Application Laid-Open No. 3-4354, becomes complicated.

[0010] However, there is a problem that the traffic of the network increases when there is frequently referred data on the network. In fact, H
In a case where an icon is used to emphasize a heading in a TML file, a situation occurs in which a plurality of HTML files refer to the same icon image data in order to display an image of the icon. This would generate a lot of traffic for the data.

The hypertext data display device of the present invention solves the above-mentioned disadvantages of the prior art, and can change the arrangement of data on a network node on a node-by-node basis without affecting other nodes. To provide a hypertext data display device that can reduce unnecessary network traffic by allowing data in its own node to substitute for data in which reference is concentrated in other nodes on the network. It is in.

[0012]

SUMMARY OF THE INVENTION The present invention, which achieves the above object, provides a hypertext data display device for linking data distributed on a network and displaying various data used in hypertext. Link tag detecting means for detecting and extracting a link tag from hypertext data, local resource searching means for checking whether data corresponding to the resource indicated by the extracted link tag is stored in a local file device, As a result of the search by the local resource search means, when data corresponding to the local file device is detected, a link tag for replacing a pointer of the corresponding link tag with a pointer indicating a local resource corresponding to the detected data. Replacement means and the link tag placement The necessary data is obtained from the remote host and the local file on the network based on the hypertext data on which the replacement of the pointer of the link tag required by the means is performed, and the hypertext data is displayed on a predetermined display device. Display control means for displaying.

According to a second aspect of the present invention, in the hypertext data display device, the local resource search means includes a data management table for managing data stored in the local file, and with reference to the data management table, It is characterized in that it is checked whether data corresponding to the resource indicated by the link tag is stored in a local file device.

According to a third aspect of the present invention, in the hypertext data display device, the data management table includes an identifier used for identifying data and a pointer of the data described including a node where the data is arranged. It is characterized by being managed in pairs.

[0015]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a hypertext data display device according to one embodiment of the present invention.

As shown in the drawing, the hypertext data display device of this embodiment has a hypertext data input unit 1.
0, a link tag detection unit 20, and a link tag replacement unit 30
, A local resource detection unit 40, a hypertext data display unit 50, a network control unit 60, a local resource control unit 70, a remote host 80 connected via a network, and a local file device 90. In FIG. 1, only the characteristic configuration of the present embodiment is described, and the description of other general configurations is omitted.

The hypertext data input unit 10 is realized by a memory such as a RAM and an interface to a network or various file systems, and inputs desired hypertext data from a predetermined file system or a local file system on the network. And memorize.

The link tag detecting section 20 is realized by a CPU controlled by a program, and is connected to the hypertext input section 10.
The link tag portion is detected and extracted from the character string of the hypertext data stored in.

The local resource search unit 40 is realized by a program-controlled CPU and a memory such as a RAM.
A data management table 41 is provided inside. FIG. 2 shows an example of the data management table 41. The data management table 41 stores a local file device 90 connected to the hypertext data display device without using a network.
Is stored as a pair of a data identifier and a URL for each data. Here, the data identifier is a portion of the URL excluding information on an access method and arrangement of data, and is a portion corresponding to a file name or a data name. An arbitrary character string can be given to the data identifier. For example, the file name of the data file in the local file device 90 may be used as the data identifier.

The local resource search unit 40 extracts a data identifier from the link tag received from the link tag detection unit 20, refers to the data management table 41, and stores data corresponding to the resource indicated by the link tag in the local resources. Determine if it exists. When the data exists in the local resource, the link replacing unit 30 rewrites the portion corresponding to the extracted link tag in the hypertext data so as to indicate the local resource. On the other hand, if the data does not exist in the local resource, the link tag is not rewritten. The hypertext data subjected to the link tag replacement processing is sent to the hypertext data display unit 50.

Hypertext data display control unit 50
Is realized by a program-controlled CPU, controls the network control unit 60 or the local resource control unit 70, acquires necessary data, and displays it on a display device.
That is, when the link tag indicates a resource existing in the file system on the network, the network control unit 60 is controlled to acquire data from the remote host 80. When the link tag indicates a local resource, the local resource control unit 70 is controlled to acquire data from the local file device 90.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.

First, the hypertext data input unit 10
As a result, HTML data is obtained from a predetermined file system (step S301). Then, the link tag detection unit 20 detects the link tag of the anchor or the inline image (step S302). If no link tag is detected, the hypertext display unit 50 displays the hypertext data stored in the hypertext data input unit 10 and ends the processing (step S309).

On the other hand, when the link tag is detected, the link source object and the link destination pointer are sent to the local resource detection unit 40. Local resource detector 4
0 first extracts a data identifier portion from the link tag and searches whether the same data identifier exists in the data management table 41 (step S304). When the same data identifier is detected in the data management table 41, the pointer of the link tag in the processing of the hypertext data stored in the hypertext data input unit 10 is set to the corresponding local resource in the data management table 41. The pointer is replaced with the pointed-to pointer (steps S305 and S306).

If the same data identifier is not detected in the data management table 41, the process proceeds to step 307 without performing any processing (step S305).

Next, the network control unit 60 and the local resource control unit 70 operate under the control of the hypertext display control unit 50, and the remote host 80 operates in accordance with the pointer of the link tag with respect to the hypertext data processed as described above. Or local file device 9
From 0, data of a link destination required for displaying a linked image or the like is obtained (step S307). Then, the acquired data is displayed on the display device by the hypertext display control unit 50 (step S30).
8).

The data identifier and URL registered in the data management table 41 and the data of the local file device 90 corresponding to the registered contents can be added or changed as appropriate.

Although the present invention has been described with reference to the preferred embodiments, the present invention is not necessarily limited to the above embodiments.

[0030]

As described above, the hypertext data display device of the present invention registers the corresponding data identifier in the data management table in its own node for the data linked in the hypertext data, and By specifying the link destination of the URL to be used as arbitrary data, the link destination can be changed without changing the hypertext data itself. For this reason, the arrangement of data on a remote network node can be changed on a node-by-node basis without affecting other nodes, and a node management table that needs to be centrally managed can be provided, and data on each node can be stored. It is not necessary to update the node management table every time the arrangement is changed, and it is possible to reduce the time and effort required for adding and updating final information.

Further, as for the data stored in the local file device in the own node, the link destination on the remote node is changed to the data on the local file device in the own node, so that the data is changed to the remote node. No need to get from. As a result, data in which reference is concentrated in another node on the network can be replaced with data in the own node, and unnecessary traffic on the network can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a hypertext data display device according to one embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a data management table provided in a local resource search unit.

FIG. 3 is a flowchart illustrating the operation of the present embodiment.

FIG. 4 is a block diagram showing a configuration of a conventional hypertext data display device.

[Description of Signs] 10 Hypertext data input unit 20 Link tag detection unit 30 Link tag replacement unit 40 Local resource search unit 41 Data management table 50 Hypertext data display control unit 60 Network control unit 70 Local resource control unit 80 Remote host 90 Local file device

Claims (3)

[Claims] 1. A hypertext data display device that links data distributed on a network and displays various data used in hypertext, wherein a link tag is detected and extracted from the hypertext data. Means, a local resource search means for checking whether data corresponding to the resource indicated by the extracted link tag is stored in a local file device, and a search result by the local resource search means, the local file device When the data corresponding to is detected, a link tag replacement unit that replaces a pointer of the corresponding link tag with a pointer that indicates a local resource corresponding to the detected data, and a link tag required by the link tag replacement unit. Pointer placement Display control means for acquiring necessary data from the remote host and the local file on the network based on the processed hypertext data, and displaying the hypertext data on a predetermined display device. Characterized hypertext data display device. 2. The local resource search means includes a data management table for managing data stored in the local file, and refers to the data management table to refer to data corresponding to a resource indicated by the link tag. 2. The hypertext data display device according to claim 1, wherein it is determined whether or not is stored in a local file device. 3. The data management table manages a pair of an identifier used for identifying data and a pointer of the data described including a node where the data is arranged. 3. The hypertext data display device according to 2.