Explicit support for the Enabled attributes

[ml019]

Expected Behaviour

If an Enabled attribute is desired/required for a component, then it should be explicitly added in the component configuration.

This makes schema generation and documentation as there are no implicit rules to have to worry about.

Current Behaviour

Enabled attributes are added by default to any attribute grouping and there is then logic to permit them to be inhibited.

Possible Solution

• remove the logic that adds Enabled attributes
• remove the support for Implicit enabled
• force ALL attribute definitions to use the full hash structure
• remove support for string based attributes.

Context

• less complex code for attribute normalisation
• better consistency between definitions and generated schemas and documentation