What this Standard Specifies

To address the issues listed above, this Standard constrains both syntax and semantics, but it is not intended to predefine application behavior. Therefore, it includes, among others, the following three types of information:

1. Schemas and an associated validation procedure for validating document syntax against those schemas. (The validation procedure includes un-zipping, locating files, processing the extensibility elements and attributes, and XML Schema validation.)

2. Additional syntax constraints in written form, wherever these constraints cannot feasibly be expressed in the schema language.

3. Descriptions of element semantics. The semantics of an element refers to its intended interpretation by a human being.