Validating xml dtd
Imagine a scenario where data is being exchanged in an XML format between multiple organizations.The integrity of business-to-business data is vital for the smooth functioning of commerce.
DTD markup also defines the type of data that will occur in an XML element and the attributes that may be associated with those elements.To ensure validity in your XML documents, learn how to use DTDs, which provide a roadmap for describing and documenting the structure.Topics include DTD examples, structure of a DTD, drawbacks, and alternatives.No undeclared attributes will be allowed and no required attributes may be omitted.In short, every last detail of the XML document from top to bottom will be defined and validated by the DTD.It can also be external, referenced by the XML document.
A single XML document could even have both a portion (or subset) of its DTD that is internal and a portion that is external.
Although validation is optional, if an XML author is publishing an XML document for which maintaining the structure is vital, the author can reference a DTD from the XML document and use a validating XML parser during processing.
Requiring that an XML document be validated against a DTD ensures the integrity of the data structure.
The coverage of the DTD structure will begin with a discussion of the Document Type Declaration.
Then we will move on to the functional items that make up the DTD.
XML is a meta-markup language that is fully extensible.