While defining Common Lookups or value sets, you need to provide module value. Each module has an associated module type, module key and product code associated with it. For example:
These details are stored in backed in a table – FND_APPL_TAXONOMY.
Use the below query to find module type, module key etc for a module:
select fat.MODULE_NAME ,fat.MODULE_TYPE ,fat.MODULE_KEY ,fat.PRODUCT_CODE from FND_APPL_TAXONOMY fat