FreeSchema

The value of an instance concept is evaluated by following its referent id. The system looks at the concept whose id is the referent id and continues down the chain until it finds a raw data concept, at which point the system checks the raw data table of the correct type (determined by the type id) to find the data value.

On the other hand, the value of a type concept is obtained by combining the values of its category id and its type id. The system evaluates the category and type recursively, down to the characters concepts referring to the individual words.

New types are created by finding existing types and words and combining them.

A composition concept's evaluation value is the combined evaluation values of the concepts that it is connected to. Each connection's evaluation value is labelled with the type of the concept that is connected to.