What Is the Sequence of Sub-elements

Q

What Is the Sequence of Sub-elements? - XHTML Tutorials - Introduction To Element Content Syntax

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A

The sequence of sub-elements is the order of how each sub-element is placed inside the parent element. For most parent elements, their sub-elements can be placed in any order. But some parent elements require you to follow a predefined sequence.

For example, element "html" requires that "head" to be placed first, and "body" to be placed second.

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