DTD
1) script element had href #REQUIRED, should be #IMPLIED

Examples
1) defs_ancestor.xml had invalid element ordering and unescaped < and > in content
2) desc.xml had invalid ordering
3) filters02.xml had omitted start <svg>, radius instead of stdDeviation, and an unknown attribute mode="AinB" which I assumed was supposed to be operator="in"
4) image-valid.xml, missing "=" in attribute-value pair
5) image-wf.xml, show should be "parsed" not "replace"
6) marker-effect.xml had a transform on an svg, moved it to a g child of svg instead.
7) mask.xml, image element was missing width and height
8) (a note, not a change) rdsf namespace prefix is not used in metadata.xml, what is it for
9) path01 was wf, altered to be explicitly valid ie have a doctype, which SP thinks is the same thing.
10) path02 deleted (no longer used, and no longer valid anyway)
11) patternfill.xml changed spurious &gt; to >
12) (a note) switch.xml, should src be xlink:href ?
13) symbol-use2a.xml removed unescaped < and >
14) symbol-use2b.xml removed unescaped < and >, altered description to match contents
15) added font01.xml, font02a.xml and font02b.xml which were missing
16) font01.xml had missing width, height, invalid font-family attribute and missing lots of required attributes
17) font02[a,b] had same problem.


