Architecting and designing > DoDAF > DoDAF 1.5 standard > Creating operational view products > Creating OV-5 activity models > Specifying IDEF0 models for the OV-5
  
Specifying IDEF0 models for the OV-5
The IDEF0 model is a grouping mechanism for OV-5 diagrams. In the model, you specify properties such as model viewpoint, purpose, and description.
In the model you build an OV-5 context diagram, and then decompose that diagram with multiple child OV-5 constraint diagrams.
Context diagrams
Every OV-5 context (or A-0) diagram must be associated with a model. You must define a model name for the diagram when you create it. This rule complies with the IDEF0 specification.
Constraint diagrams
To provide flexibility in modeling, you are not forced to define a model for non-context OV-5 diagrams. You can add one later.
You can create the model definition as you create an OV-5 Context diagram, or you can create the model definition independently, and then specify it when you create the OV-5 Context diagram.
See also
Creating IDEF0 models independently
Creating a model definition as you create an OV-5 Context diagram
Adding an IDEF0 model to existing OV-5 constraint diagrams
Propagating IDEF0 models automatically
Defining IDEF0 model properties
Creating OV-5 activity models