# Specifications

Specifications for products are stored in several different places in the product data model.

• Global specifications

Specifications that are global across the entire product repository are stored in the global specifications folder under Product Repository/Lookups/Global Product Specification Lookups (relative to the product repository).

These specifications are typically stored as lookup tables where a key and a set of predefined values are defined.

• Classification specifications

For each classification scheme there is typically a list of specifications associated with each category. These are the specifications that make it possible to compare all products present within a category made by different manufacturers.

These are also the specifications normally used for navigated or faceted search.

• Type specifications

There is a close relationship between a product and its type and therefore there are three pieces of specification information available on types:

• Specifications in the form of keys or keys + values (lookup tables).

• Specification options that narrow down the lookup table options for subtypes.

• Specification default values that contain values for specification. All products of the given type will have those values.

• Product specifications

Specifications that are unique to specific products can be stored under the product itself. Typically, most specifications will be on the product type.