Embed Math-ml data in a XML element?

Hi, 

I am a beginner in xml.  I have a question about the xml, its schema 
and validation.

I plan to include some Math-ml data into a database field mixed with 
text and output to a brower to display it combined with .XSL file 
through some plugins.  But I did not know how to edit its schema file 
and construct the xml data file which can be validated in IE5.

for example, the database field contains:"this is a math-ml data 
<EMBED mmldata="<mml>.....</mml>"></EMBED> for test".

Does the content-attribute "mixed" be a way?  But how?

Any help and suggestion will be appreciated vary much.

feng haitao
00.4.11


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