need to add NOT operator to pathquery.dtd
The query description supported by pathquery.dtd does not currently support the
"NOT' boolean operator, which should be provided as a choice in the "searchmode"
attribute as "is-not". Also, the "matches-exactly" operator should be changed
to "is". Finally, the QuerySpecification class needs to be updated to support
#2 Updated by Jivka Bojilova about 20 years ago
Included new terms in pathquery.dtd for searchmode:
equals (former "matches-exactly")
Added support for them in QuerySpecification. Tested in Oracle.
For = and != operators: ='1' and =1 (!='1' and !=1) work in the same way for
numeric operands thus ='operand' is used only.
For >, >=, <, <= operators check for numeric operand is added like:
if (operand is Number)
else //character operand