A method and apparatus store multiple items across different categories in a database. A database includes an attribute value table that has item entries for items of different categories. Each item entry has attribute values for attributes of the items. The database also includes an attribute map table that has attribute map entries. The attribute map entries have attribute map values. Additionally, an attribute value is associated with an attribute map entry, such that the attribute values are translated based on the attribute map values of the associated attribute map entry. In one embodiment, the translating of an attribute value includes determining an attribute type associated with the attribute value.