Include xhtml like xinclude in docbookxi.rng?

[RFC] Include xhtml like xinclude in docbookxi.rng?

When I validate defguide5-en.xml, the following errors
occurred:

C:wcsvndocbookdefguide5enbuild>java -jar jing.jar
docbook.rng
defguide5-en.xml

C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:22269:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:22391:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:22636:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:22758:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:44278:
error:
unknown element "form" from namespace "http://www.w3.org/
1999/xhtml"
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:44280:
error:
unknown element "input" from namespace "http://www.w3.org/
1999/xhtml"
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:44281:
error:
unknown element "input" from namespace "http://www.w3.org/
1999/xhtml"
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:44282:
error:
unknown element "input" from namespace "http://www.w3.org/
1999/xhtml"
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:44283:
error:
unknown element "input" from namespace "http://www.w3.org/
1999/xhtml"
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:44284:
error:
unknown element "input" from namespace "http://www.w3.org/
1999/xhtml"
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:53921:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:53980:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:53984:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:54048:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:54068:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:54332:
error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:103459
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:103518
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:103522
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:103622
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:103642
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:103998
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:105954
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:106080
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:107201
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:107334
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:110942
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:111077
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:112566
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:112699
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:113400
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:113531
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:116500
: error:
unfinished element
C:wcsvndocbookdefguide5enbuilddefguide5-en.xml:116621
: error:
unfinished element

Any suggestion?

Dongsheng

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