In XML,the rules about which elements are required and which are not are stored in a document called the _______.
A)schema
B)dictionary
C)index
D)glossary

Question

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The rules about which elements are required and which are not are stored in a document called a schema in XML. Schemas define the structure, content, and semantics of XML documents and are used to validate XML documents.

In XML,the Rules About Which Elements Are Required and Which