Steven Huey wrote:
I tried searching the archives and wiki but couldn't find any examples
of XPath or SQL queries for searching the contents of multiple-value
string properties. I have a set of nodes, each with a property that can
contain multiple string values and I'd like to be able to quickly find
all the nodes that have a given string as one of their values.
See the JSR 170 specification sections:
- 6.4.2.5 Multi-value Properties
- 6.6.4.10 Searching Multi-value Properties
Searching for multi-valued properties is basically the same as searching for
single-valued properties.
//[EMAIL PROTECTED] = 'bar']
will return all nodes with a property called foo and a value 'bar'. Both single-
and multi-valued matches are returned. The = is called a general comparison.
If you are only interested in nodes with a single value for property foo:
//[EMAIL PROTECTED] eq 'bar']
will return all nodes with a property foo and a single value 'bar'. E.g. nodes
with a multi-valued property foo and values {'foo', 'bar'} will not be returned.
But the query will still return matches for multi-valued properties if foo
just contains the one value {'bar'}. The eq operator is called a value comparison.
In most cases you should be ok with the general comparison operator.
regards
marcel
