formId. Specifies the name of the form used for the search. The default form will be used if the attribute is left empty. If this tag is used without a form, this attribute must be set to provide an identifier for the resultIterate tag.
Collection. (optional) A comma-delimited string representing collection(s) used for a search. If there is a form action, this attribute is ignored and the values are retrieved by requesting the collection element.
Query. (optional) Specifies the query text. If not provided, it is retrieved from the query element.
Scope. Specifies an integer indicating the scope of the search results. The value 1, which is the default, indicates page scope, and 2 indicates session scope.