OTX in all variables, parameters, terms, etc. must have a declared type. Within theOTX-Core Library is a distinction between two categories, as illustrated.

Nesting of OTX data types

• Simple data types (Simple data type)

  Simple data types describe scalar elements that can store a value accurately.

• Complex data types (Complex data type)

  Complex data types from simple data types or other composite objects that can generally save more than one value.

Libraries may add the extension mechanism defined in the core new data types.