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XML Outlook

Any new technology has its background of requirements, XML was born after HTML encountered insurmountable difficulties. In recent years, HTML has encountered problems in many complex Web applications. To solve these problems completely, HTML must be replaced by powerful XML as a writing tool for Web pages. XML is beneficial to the expression and structured organization of information, thus making data search more effective;XML can use URL aliases to make the maintenance of the Web more convenient, but also to make the application of the Web more stable;XML can use digital signatures to make the application of the Web more widely expanded to the field of security. One can assume that the Web authoring tool of the future must be XML. The widespread use of XML will certainly promote the continuous development of the Web, thus creating a new era of Web applications.

Web applications will grow with the use of XML, and here are a few of the applications you can foresee for XML.

(1) XML/EDI Electronic Data Interchange

EDI(Electronic Data Interchange) is the use of electronic technology instead of paper-based means of operation for the exchange of documents between companies. XML is a rich format language that can be used to describe different types of documents, such as letters of credit, loan application forms, insurance policies, claims, and various invoices. Structured XML documents send data to the Web that can be encrypted and easily attached with digital signatures. XML security measures can fully display its charm in the application of EDI, XML is expected to promote the large-scale application of EDI.

(2) Chemical Markup Language CML and Mathematical Markup Language Math ML

CML (Mathematical Markup Language) and CML (Chamical Markup Language) are markup languages used to describe chemical and mathematical formulas. CML can describe molecular and crystal structures, spectral structures of compounds, etc. Math ML is a boon to mathematicians, who for the first time since the Web were born can use Math ML to display mathematical formulas accurately on browsers.

3) Open Software Description Format OSD

Similar to EDI's fate, online distribution of software packages has been in the pilot phase. OSD(Open Software Descripton) is a set of XML tags used to describe various software products, which can describe the specifications, instructions and runnable platforms of software in detail.

(4) Channel definition format CDF

Channel definition format (CDF) is an XML data format used by Microsoft in IE 4.0 browsers to describe the contents of active channels and desktop parts, indicating channel information and its updates. CDF enables interoperability between different platforms, giving Web publishers control over push technology. Dedicated push technologies will no longer interfere with interoperability between push technologies, so that the same Web content can be obtained from incompatible platforms.

(5) Open Financial Exchange OFX

OFX(Open Financial Exchange) is also a markup set of XML used to describe transactions between accounting firms and customers. OFX enables direct exchange of financial data between clients and accounting firms, including documentation such as electronic banking and payment agreements.

To drive XML usage, the W3C has approved version 1.0 of the XML standard, believing XML 1? 0 will drive a large number of advanced Web applications, and users must start thinking about writing Web pages in XML from now on. But the proliferation of XML doesn't mean HTML will die out any time soon. Habit is a powerful force, and just as Cobol has not retired from history for a long time, HTML will never be retired easily because a large number of existing Web pages are written in HTML. It can be expected that XML will be used alongside HTML in different areas of Web applications within the next five years.

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