_docCache.put(testDataId, testDataDoc);
}
// import namespace decl
Map<String, String> nsmap = testDataDoc.documentTable().getDeclaredNamespaces();
NamespaceBinder nsResolver = statEnv.getStaticalyKnownNamespaces();
nsResolver.declarePrefixs(nsmap);
// reserve variable
QualifiedName varName = QNameTable.instantiate(XMLConstants.DEFAULT_NS_PREFIX, varNameStr);
Variable var = new Variable.GlobalVariable(varName, null);
var.setResult(testDataDoc);
xqmod.putVariable(varName, var);