Query searches help you search the contents of forms attached to your topics, as well as the values of other meta-data attached to the topic. ... All meta-data in a topic is referenced according to a to a simple plan. name - name of the topic . ... fields means the same as META:FIELD , You can also use the name of the form (the value of form.name e.g. PersonForm ) . ... HistoryForm[name='Age'].value>2 - true if the topic has a HistoryForm , and the form has a field called Age with a value > 2 . ...