Errors in Part 4 RNC schemas in the consolidated Part 4

[MURATA Makoto (FAMILY Given)]

Here are some errors in Part 4 RNC schemas revealed by trang.
I suppose that oXygen comparison will find more errors.

In B.4.2,

"This schema is available in the file dml-compatibility.rnc." is missing.

In B.3.1.12,

Replace PresentationML_Presentation.rnc by PresentationML_User-Defined_Tags.rnc.

In B.3.1.13, 

Replace PresentationML_Presentation_Properties.rnc by PresentationML_View_Properties.rnc.

In B.5.1, get rid of dchrt_ST_PerspectivePercent  and dchrt_ST_PerspectiveUByte,
and keep the original def of dchrt_ST_Perspective.

Cheers,
Makoto