Order keys attribute

In OXML schema, collections (extents, references and relationships) may define one or more order keys in the orderKeys attribute, which are used to build indexes for fast instance location. One or more order keys separated by comma can be defined for the collection.

oxs:orderKeys="order_key1 [, order_keyN]"

Each order key consists of a key name and several optional attributes:

key_name(unique,suppressEmpty,temporary,large)

Each key name must refer to a key name defined in the structure (complex data type) referred to in the dataType attribute of the collection. When defining optional attributes, those must be appended in parenthesis.