Whitespace includes the space character, new lines, and tabs.
Whitespace is used to separate words to make text more readable.
In XML, no whitespace stripping takes place for PCDATA.
<Tag>This is a paragraph.
this is a test.</Tag>
the PCDATA is
This is a paragraph.
this is a test.
XML parsers change all new lines to a single linefeed character before processing.
1.5.PCDATA |
| 1.5.1. | Whitespace in PCDATA |