Attribute metadata JSON schema is difficult to query

[ericghara]

Background

Currently metadata is represented as a list of serialized AttributeMetadata objects. This was chosen to allow for the possibility of one-to-many Model <-> MetadataType relationships. Unfortunately, it is cumbersome to quickly retrieve specific attributes from a list.

Enhancement

Metadata could be represented as {*MetadataType* : {*Attributes*}}. In cases where a one-to-many relationship is possible, the metadata could be represented as {*MetadataType* : [{*Attributes*}...]}