name of parser factory property that should be used for system property
or in general to retrieve parser factory clas sname from configuration
(currently name of peroperty is org.xmlpull.v1.XmlPullParserFactory)
FEATURE: Report namespace attributes also - they can be distinguished
looking for prefix == "xmlns" or prefix == null and name == "xmlns
it is off by default and only meaningful when FEATURE_PROCESS_NAMESPACES feature is on.
Get next parsing event - element content wil be coalesced and only one
TEXT event must be returned for whole element content
(comments and processing instructions will be ignored and emtity references
must be expanded or exception mus be thrown if entity reerence can not be exapnded).
EVENT TYPE and TOKEN: signalize that parser is at the very beginning of the document
and nothing was read yet - the parser is before first call to next() or nextToken()
(available from next() and nextToken()).