Connection technology of XML information content

The full name of XML is eXtensible Markup Language, which refers to the meta-language, that is, the language of the production language and the extensible group language. It is the successor language of SGML (Standard Generalized Markup Language), not the successor language of Hypertext HTML (Hypertext Markup Language). It ’s meaningless to just use XML, but you ca n’t exchange information without using the language created by XML.

The XML file can provide a two-way connection, and promote the standardization of Xlink / xpointer, which is seeking to manage the information content and the connection separately. The structure and function of Xlink / Xpointer, as well as the procedures for processing such information, will be summarized below.

What can be solved with Xlink

The connection function of HTML is very simple and convenient. However, if the content of the information is reconstructed using XML, it is considered that the connection information is also created using XML. Incorporating the elements of HTML and HyTime into Xlink.

Xlink recommended by the W3C (World Wide Web Consortium) only stipulates the "recording method for writing out the relationship between A and B". As for assembly, there are no regulations. That is to say, how to assemble is completely at the producer's will. However, if it can be described in accordance with the provisions of Xlink and assembled into application software, the following functions can be completed.

(1) Without changing the A and B files created by others, you can add the connection information between the A and B related files.
(2) Only the connection information between files can be aggregated, and the information content can be reused after arbitrary movement or exchange. If HTML is used, the connection information is included in the information content, so it is impossible to extract only the summary of the connection information. As for Xlink, the connection information is beyond the content of the information, so you can only define the summary of the connection information. Even if the content is controlled by others, as long as the summary of the connection information is exchanged, the information content can be reused.
(3) Using Pointer, you can describe the information filled by the connection partner.
(4) Several connection partners can be defined. HTML can only describe one connection to the other, but it can make one or several connections occur.

Application example of XLink (XML linking language)

Using the description of Xlink connection information and assembling the application software corresponding to Xlink, the following application examples can be considered:

Update of connection information; access management; knowledge management; filling of information; dynamic publishing of information content; file management; various media information content made from one main information source; multiple reference information management at the same time; using Xlink to reach information Content management.

In addition, the main points of using Xlink for information content management are:

(1) When Wlink ’s standard technology Xlink is considered as XML or exported HTML, it should adopt the same affinity and worldwide W3C standard technology.

(2) World-wide network breadth management Between multiple offices connected by a network, as long as the information content of the connection using Xlink is used, the administrator can manage the entire information content through the network.

(3) Reuse of third-party information content As long as you use Xlink, you can easily reuse XML information content created by a third party. However, in actual operation, how to use information produced by a third party to do business needs to consider other issues such as copyright.

Features of Xlink

Xlink development was initiated almost simultaneously with XML (1997). However, in the process of specification production, some people want to absorb as many functions as possible, but some people want to make it into a simple format. A lot of time was wasted due to mutual disputes and multiple changes in the preparation procedures. It was only recommended as the W3C's achievement in June 2001.

Xlink is to describe the connection information in the XML file or between several XML files, which can promote the connection between several files existing on the Internet, so it has the following characteristics:

(1) You can specify the relationship between more than two file resources;
(2) HTML connection information is described in the HTML file, but Xlink can separate the connection information from the resources.
(3) The search connection information can be automatically specified to understand this designation, and the user can read the information of the connected party without operation.

Xlink's future and existing issues

Xlink can also promote the reuse of information in an information-dispersed environment. At the same time, XML files and Xlink alone can dynamically generate combined information content.

Xlink can manage information in multiple directions or two directions, so that all information content meets the requirements of various specific objects. In order to allow most people to give new added value to their respective objects, the information is delivered after reprocessing Using, nowadays, the method of adding value to information has changed.

Due to the use of Xlink, it has become possible to create new information with a combination of multiple information, but in the use of Xlink, the following issues exist:

(1) Copyright issues at the time of reuse Xlink provides a structure that can easily reuse information content created by a third party. This is not a problem in the case where all information content is produced on its own, but if you plan to use external resources to create more useful information content, there will be copyright problems. This can be technically a certain solution, but there are still legal issues.

(2) Simple production environment Now, it is not easy to produce information content by XML, and it is even more difficult if Xlink is added. At present, there is no simple production environment, but some special function software has been introduced. Therefore, the solution to this problem is just around the corner.

(3) The popularization of XML information content is indeed the biggest issue. From the current situation, the content of XML information on the network is very small. Most of the information provided by online is not provided to users in XML, but is managed after being compiled in XML.

By the way, using XLink is great for users. Even if you provide XML information directly for a fee, you can charge a usage fee. Therefore, properly transferring the business to the beneficiary is the key to solving the problem.

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