[Name] ignoreDTD XmlAncestors [Values] true or false inherit, none [Description] if set where to true, ignore inherit the DTD completely, which means do not normalize attributes, do not look into entity definitions, do not add default simple inheritable attributes ( xml:lang and xml:space ) and combine the xml:base i.e. similar to each element false expandEntities true Canonical XML 1.1 or false if set to true completely ignore all entity declarations, and expand only the predefined entites (lt, gt, amp, apos, quot) and character references. (Entity declarations are potential attack points, [BradHill] mentions an entity that is 2 GB is length, also expanding external entities can lead xml attributes in ancestors similar to cross site scripting attacks) Exclusive Canonical XML 1.0 [Default] 
true inherit
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X M L s e r i a l i z e X M L
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c o m b i n e e m p t y s e t