Link Clauses Link fields can be compared for a single value using an object ID as the value. Example: Manager=def413 A link can also be tested for membership in a set of values using the IN operator: DirectReports IN (zyxw098, ghj780) DirectReports = (zyxw098, ghj780) The two examples above are equivalent. Inequalities and range functions are not allowed for link fields. Links can also be used in path expressions, which are described in the following sections.