Thanks to: @pentest_swissky, @signalchaos, @itsecurityguard, @mickeyc
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### 1. XML
*xmlns* is the XML name-space, *something* the prefix for the name-space (to avoid name conflicts with other XML fragments).
*CDATA* stands for "Character Data" and means that included data (inside the tag) could but should not be interpreted as XML.
*CDATA* is part of the XML document, while a comment is not.
### 2. SVG
*\* creates a graphic which contains at least three sides (0,0; 0,50; 50,0).