[xml] validate by schema works but only after reparsing ?

[Peter Sobisch <petersob gmx net>]

Hi,

I studied the testSchema.c file and write my own program for schema validation.
If I try to validate the xml-Doc (xmlSchemaValidateDoc) I get rc=10
(XML_SCHEMAS_ERR_ELEMCONT) but, if if write the doc out (xmlSaveFormatFile)
and parse it again (xmlParseFile) the validation is successful (rc=0).

I use the libxml2 2.5.7 on Solaris 2.6.
What I do is (in the using order):

xmlParseFile()
xmlNodeSetName()        ( to rename a node)
xmlUnlinkNode()         \ both for remove a node
xmlFreeNode()           /
xmlNewNode()            (to create a new node)
xmlNodeSetContent()     (to set a content of the created node)
xmlAddNodeSibling()     (to insert the created node)
and than some xmlNewChild()     (just append some new nodes)

now going to validate by a schema:
xmlSchemaNewParserCtxt()
xmlSchemaParse()
xmlSchemaFreeParserCtxt()
xmlSchemaNewValidCtxt()
xmlSchemaValidateDoc()          <- here comes rc=10
xmlSchemaFreeValidCtxt()

xmlSaveFormatFile()
xmlFreeDoc()

xmlParseFile()
xmlSchemaNewParserCtxt()
xmlSchemaParse()
xmlSchemaFreeParserCtxt()
xmlSchemaNewValidCtxt()
xmlSchemaValidateDoc()          <- here comes rc=0
xmlSchemaFreeValidCtxt()
xmlFreeDoc()

for location purposes I use the XPath API (which works very well).

I have no idea where is the difference, I already checked the Doc- and Ns-pointer 
and the types (node->type) of each node but there are no differencies between the doc I
try to validate before writing and the doc after writing and parsing.

Do you have any hints what can I do or check ? 
Maybe I have do something with the doc after I did changes but befor I'm going to reparse
it ? But what ?

Thanks in advance !

with best regards
Peter Sobisch