XML information content connection technology
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The full name of XML is eXtensible Markup Language, which is a meta-language, that is, a language for making languages, and an extensible group language. It is a successor to SGML (Standard Generalized Markup Language), not a successor to hypertext HTML (Hypertext Markup Language). It's pointless to just use XML, but you can't exchange information without using a language made in XML.
XML files provide a two-way connection and drive the standardization of Xlink/xpointer, which is seeking to manage the content and connectivity separately. The composition and function of Xlink/Xpointer, as well as the procedures for processing such information, will be summarized below.
What can I solve with Xlink?
The HTML connection is very simple and convenient. However, if you re-compile the information content with XML, you will consider the connection information and also use XML. By incorporating the elements of HTML and the elements of HyTime, Xlink was created.
The Xlink recommended by the W3C only stipulates the "recording method for writing the relationship between A and B". As for the assembly, there is no provision. In other words, how to assemble, completely listen to the wishes of the producer. However, if you can describe it according to Xlink's rules and assemble it into the application software, you can complete the following functions.
(1) When the A and B files created by others are not changed, the connection information between the A and B related files can be added.
(2) It is possible to summarize only the information between the files, and to use the information content after arbitrarily moving or exchanging. In the case of HTML, since the connection information is included in the information content, it is not possible to extract only the summary of the connection information. As for Xlink, the connection information is outside the information content, so it is possible to define only the summary of the connection information. Even if the information content is controlled by others, the information content can be reused by simply exchanging the connection information.
(3) Using Pointer, you can describe the information that is connected to the other party.
(4) Several connection partners can be defined. HTML can only describe one connection, but can make connections at one or several places.
XLink application examples
Use Xlink to connect to the description of the information and assemble the application software corresponding to Xlink. Consider the following application examples:
Connection information update; access management; knowledge management; information filling; dynamic release of information content; file management; various media information content made by one main information source; multiple reference information management at the same time; Management of content.
In addition, the main points of using Xlink for information content management are:
(1) W3C standard technology
When Xlink is considered as XML or output HTML, it should adopt the same affinity and worldwide W3C standard technology.
(2) World-wide network breadth management
Between the various offices connected by the network, the administrator can manage the entire information content by means of the network according to the content of the connection information using Xlink.
(3) Reuse of information content of third parties
As long as you use Xlink, you can easily reuse the XML content produced by third parties. However, in actual operation, how to use the information content produced by a third party to do business, but also need to consider other issues such as copyright.
Xlink features
The development of Xlink was launched almost simultaneously with XML (1997). However, in the process of specification production, some people want to absorb various functions as much as possible, but some people want to make a simple format. Due to mutual disputes and multiple changes to the programming process, a lot of time was wasted, which was recommended as a result of the W3C in June 2001.
Xlink describes the connection information in an XML file or between several XML files. It can promote the connection between several files existing on the Internet, so it has the following characteristics:
(1) You can specify the relationship between two or more file resources;
(2) HTML connection information is described in the HTML file, but Xlink can separate the connection information from the resource.
(3) The connection information can be automatically specified, and the designation can be made clear, and the user can read the information of the connection party without any operation.
The future of Xlink and existing issues
Xlink can also promote the reuse of information in an information-distributed environment. At the same time, XML files and Xlink can dynamically generate combined information content.
Xlink can manage information in a multi-directional or two-way manner, so that all information content meets the requirements of various specific objects. In order to allow most people to assign new added value to their respective objects, the information is reprocessed and delivered. Using, today, the method of appending value to information has changed.
With Xlink, it has become possible to create new information with a combination of multiple information, but with Xlink, there are the following topics:
(1) Copyright issue when reusing
Xlink provides a structure that makes it easy to reuse information content created by third parties. This is not a problem in all situations where the content of the information is produced by itself, but if you intend to use external ready-made resources to create more useful information content, copyright issues will arise. This can be technically solved, but there are still problems in the legal aspect.
(2) Simple production environment
Now, it's not easy to make information content by XML. It's not easy to add Xlink. There is currently no simple production environment available, but a number of dedicated feature software has been released. Therefore, the solution to this problem is just around the corner.
(3) Popularization of XML information content
This 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 the online is not provided to the user in XML, but is managed after being compiled in XML.
By the way, using XLink is good for users, and it is possible to charge a usage fee even if the XML content is directly provided for a fee. Therefore, properly transferring the business to the beneficiary is the key to solving the problem.