<group-number>
is an integer value denoting a grouping of filter constraints<field-name>
is a the name of the field to apply the constraint to. A valid field name is one that matches the regular expression [A-Za-z_][A-Za-z_0-9\-\.: ]
<display-value>
is an optional label to attach to the filter<filter-value>
is the actual constraint to be applied to the field named <field-name>