> libxml2 and our XPATH function doesn't support default namespace ( > http://plasmasturm.org/log/259/ ). This is pretty useful feature - so I > implemented. This is the mayor issue of libxml2 library. Another difference > between XPATH function and XMLTABLE function is using two phase searching > and implicit prefix "./" and suffix ("/text()") in XMLTABLE. XMLTABLE using > two XPATH expressions - for row data cutting and next for column data > cutting (from row data). The our XPATH functions is pretty simple mapped to > libxml2 XPATH API. But it is not possible with XMLTABLE function - due > design of this function in standard (it is more user friendly and doesn't > require exactly correct xpath expressions). >
libxm2 doesn't support xpath 2.0 where default namespace was introduced.
