4.1.1 PARSING

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4.1.1 PARSING<br />

In using markup languages
Elements have complete start and end tags, elements are nested according to their specifications
Elements do not contain duplicate attributes
IDs are unique, except where the specifications allow these features. (Level A)
Note: Start and end tags that are missing a critical character in their formation, such as a closing angle bracket or a mismatched attribute value quotation mark are not complete.