CLOSE - WD02 - Work towards a common syntax for Requirement definitions (currently 3 variant grammars/forms)

Here is what we have now:

1. Requirement for a specific named entity (e.g., a Node Type or Node Template)

• <requirement_name>: <entity_name>

1. Requirement clause for a specific named Capability Type

• <requirement_name>: <capability_type_name>

1. Requirement for a node type with an optional, explicit Relationship type

• <requirement_name>: <node_type_name>
  relationship_type: <relationship_name>

Thomas, Derek and Matt believe we can collapse into single grammar.

Also, we need to expand the definitions to show constraints.