I saw the line below in code for a DOM parser at this tutorial.
Puts all Text nodes in the full depth of the sub-tree underneath this Node
The rest of the sentence is:
where only structure (e.g., elements, comments, processing instructions, CDATA sections, and entity references) separates Text nodes, i.e., there are neither adjacent Text nodes nor empty Text nodes.
This basically means that the following XML element
<foo>hello wor ld</foo>
could be represented like this in a denormalized node:
Element foo Text node: "" Text node: "Hello " Text node: "wor" Text node: "ld"
When normalized, the node will look like this
Element foo Text node: "Hello world"
And the same goes for attributes:
<foo bar="Hello world"/>, comments, etc.