Using the Filter Builder

An expression filter comprises one or more sheets. Each sheet specifies an ASL filter or is composed of one or more attribute/value pairs. Each pair includes the attribute name and an expression to match against that attribute’s value. To match a given sheet, a notification or topological element must match every attribute/value pair specified in the sheet.

You can specify multiple sheets. A notification or topological element passes the filter if it matches at least one sheet.