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XML Certification Quizzer: some interesting aspects of XML syntax. (Certification).

Article Excerpt
In this month's "XML Certification Quizzer," we are going to review some interesting aspects of the syntax of XML and related technologies. You can learn more about the syntax of the language by running the sample code in the questions with an XML parser or an XSLT processor. The skills you'll learn here will prepare you for IBM Test 141 on XML and related technologies.

Question I (Information Modeling)

Which of the following XML documents is well-formed?

A. "> %ent; ]> B. ]> C. "> ]> %ent;

Select one answer.

Explanation: Choice A is the correct answer. The parameter entity reference %ent; is replaced with the element declaration for element b.

Choice B is not correct because in the internal subset of the document type declaration (the part delimited by [ and ]>), parameter entity references can occur only between markup declarations, not within markup declarations. Note that this well-formedness constraint is not applicable to parameter entity references in the external subset.

Choice C is not correct because parameter entity references can be referenced only in the DTD, not in the XML instance. The parser will treat %ent; as just a string, not...

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