ISO 19109:2015 defines rules for creating and documenting application schemas, including principles for the definition of features.
The scope of this International Standard includes the following:
- conceptual modelling of features and their properties from a universe of discourse,
- definition of application schemas,
- use of the conceptual schema language for application schemas,
- transition from the concepts in the conceptual model to the data types in the application schema,
- integration of standardized schemas from other ISO geographic information standards with the application schema.
The following are outside the scope:
- choice of one particular conceptual schema language for application schemas,
- definition of any particular application schema,
- representation of feature types and their properties in a feature catalogue,
- representation of metadata,
- rules for mapping one application schema to another,
- implementation of the application schema in a computer environment,
- computer system and application software design,
- programming.