Are GILS records supposed to point to items, catalogs of items, or catalogs of catalogs?
Any level of aggregation can be supported in GILS, and logically nesting of locators can be a powerful navigational aid. For examples of GILS at various aggregation levels, see . However, any particular set of records can be confusing if levels of aggregation vary widely. Specific policies for any particular set of locator records should be documented in a collections policy and/or usage guideline.