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what is xml ? |
Ans:) XML is a markup language much like HTML. XML was designed to describe data. XML tags are not predefined. You must define your own tags. XML uses a Document Type Definition (DTD) or an XML Schema to describe the data. XML with a DTD or XML Schema is designed to be self-descriptive. XML is a W3C Recommendation.
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| What is a markup language? |
Ans:) A markup language is a set of words and symbols for describing the identity of
pieces of a document.
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| Where do we use markup language? |
Ans:) we can use this with a stylesheet to create output for screen.
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| why XML is referred to as 'self-describing data'? |
Ans:) It is because the names of the markup elements should represent the type of
content they hold.
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| What is the purpose of XML? |
Ans:) XML has been designed for ease of implementation and for interoperability with
both SGML and HTML.
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| what are the goals of XML? |
The goals of an XML are:
- XML shall be straightforwardly usable over the Internet.
- XML shall support a wide variety of applications.
- XML shall be compatible with SGML.
- It shall be easy to write programs which process XML documents.
- The XML design should be prepared quickly.
- The design of XML shall be formal and concise.
- XML documents shall be easy to create.
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| What is SGML? |
Ans:) SGML is the Standard Generalized Markup Language (ISO 8879:1985), the international standard for defining descriptions of the structure of different types of electronic document.
SGML is very large, powerful, and complex.
XML is a lightweight cut-down version of SGML, which keeps enough of its functionality to make it useful but removes all the optional features which make SGML too complex to program for in a Web environment.
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