To enable SP's support for XML 1.0:
SP does not enforce the following XML constraints:
[Xx][Mm][Ll], both in terms of where they can occur and their content.
&in parameter literals. In SGML terms, XML says that the ero delimiter is recognized in a parameter literal, and that it must be followed by an entity reference, but the entity reference is not expanded.
Line ends are normalized using SGML conventions to a CR/LF character pair rather than using the XML convention of a single LF character.
There is no support for characters outside the basic multilingual plane (ie those with scalar values greater than U+FFFF).
SP does not enforce XML's rules on not continuing normal processing after an error. Applications can enforce these if they choose.
SP's support for SGML is based on Annex K of ISO 8879 (the Web SGML Adaptations Annex). The following features of Annex K are not yet implemented:
IMPLYDEF ENTITY YESand