History:Next Generation Schema/Track Relationships Conversion

Artist-Track

AR Type	Now	NGS	Comment
Arranger Relationship Type	Artist-Track	Artist-Work	Decided to keep it this way for now; may also be made Artist-Recording post-NGS, depending on discussion.
Art Direction Relationship Type	Artist-Track	Artist-Recording
Artist and Repertoire Support Relationship Type	Artist-Track	Artist-Recording
Audio Engineer Relationship Type	Artist-Track	Artist-Recording
Booker Relationship Type	Artist-Track	Artist-Recording
Chorus Master Relationship Type	Artist-Track	Artist-Recording
Compiler Relationship Type	Artist-Track	Artist-Recording	see discussion in Compilation Relationship Type, below
Composer Relationship Type	Artist-Track	Artist-Work
Conductor Relationship Type	Artist-Track	Artist-Recording
Creative Direction Relationship Type	Artist-Track	Artist-Recording
Design and Illustration Relationship Type	Artist-Track	Artist-Recording
Editor Relationship Type	Artist-Track	Artist-Recording
Engineer Relationship Type	Artist-Track	Artist-Recording
Graphic Design Relationship Type	Artist-Track	Artist-Recording
Instrumentator Relationship Type	Artist-Track	Artist-Work
Legal Representation Relationship Type	Artist-Track	Artist-Recording	Could also be Artist-Work, but for conversion purposes we'll keep it on this until NGS.
Librettist Relationship Type	Artist-Track	Artist-Work
Liner Notes Author Relationship Type	Artist-Track	Artist-Recording
Live Sound Engineer Relationship Type	Artist-Track	Artist-Recording
Lyricist Relationship Type	Artist-Track	Artist-Work
Mastering Engineer Relationship Type	Artist-Track	Artist-Recording
Merchandising Provider Relationship Type	Artist-Track	Artist-Recording
Miscellaneous Role Relationship Type	Artist-Track	Both
Mix Engineer Relationship Type	Artist-Track	Artist-Recording
Mix-DJ Relationship Type	Artist-Track	Artist-Recording
Orchestra Relationship Type	Artist-Track	Artist-Recording
Orchestrator Relationship Type	Artist-Track	Artist-Work	Decided to keep it this way for now; may also be made Artist-Recording post-NGS, depending on discussion.
Performer Relationship Type	Artist-Track	Artist-Recording
Photography Relationship Type	Artist-Track	Artist-Recording
Producer Relationship Type	Artist-Track	Artist-Recording
Programming Relationship Type	Artist-Track	Artist-Recording
Publisher Relationship Type	Artist-Track	Both
Recording Engineer Relationship Type	Artist-Track	Artist-Recording
Remixer Relationship Type	Artist-Track	Artist-Recording
Samples Artist Relationship Type	Artist-Track	Artist-Recording
Sound Engineer Relationship Type	Artist-Track	Artist-Recording
Travel Agent Relationship Type	Artist-Track	Artist-Recording

Release-Track

AR Type	Now	NGS	Comment
Samples Relationship Type	Release-Track	Release-Recording	Refers to actual audio data.

Label-Track

AR Type	Now	NGS	Comment
Publisher Relationship Type	Label-Track	Both

Track-Track

Note: Track-Track ARs might become either Recording-Recording, or Recording-Work, or Work-Work (and maybe also Work-Recording).

AR Type	Now	NGS	Comment
Compilation Relationship Type	Track-Track	Work-Work and Recording-Recording	Designates that a single entity (i.e. not more than one recording/work) draws from multiple entities. Thus: a specific Recording from several Recordings; it won't be Works in this case, because that would be a Medley (at least for conversion to NGS). In converting data, will be converted to a Recording-Recording AR, since Work-Work is more likely to be Medley.
Cover Relationship Type	Track-Track	Recording-Recording
DJ Mix Relationship Type	Track-Track	Recording-Recording
Earliest Release Relationship Type	Track-Track	Recording-Recording	Deprecated AR Type: such recordings should be merged
Karaoke Relationship Type	Track-Track	Recording-Recording
Mash-up Relationship Type	Track-Track	Recording-Recording
Medley Relationship Type	Track-Track	Work-Work	Medley requires a new performance, according to Mix Terminology, so the audio data is not the same -- hence should be Work-level.
Other Version Relationship Type	Track-Track	Work-Work	Should now just mean "same Work"; should be merged - deprecated
Remaster Relationship Type	Track-Track	Recording-Recording
Remix Relationship Type	Track-Track	Recording-Recording
Samples Relationship Type	Track-Track	Recording-Recording	Sampling refers to actual audio data, hence recording for the source. The choice of specific recording to sample from wouldn't change the work (i.e. two Recordings which each sample a different Recording could still be the same Work; hence Recording for the sampling entity.

Track-URL

AR Type	Now	NGS	Comment
Art Direction Relationship Type	Track-URL	Recording-URL
Artist and Repertoire Support Relationship Type	Track-URL	Recording-URL
Booker Relationship Type	Track-URL	Recording-URL
Creative Commons Licensed Download Relationship Type	Track-URL	Recording-URL
Creative Direction Relationship Type	Track-URL	Recording-URL
Design and Illustration Relationship Type	Track-URL	Recording-URL
Free Download Relationship Type	Track-URL	Recording-URL
Graphic Design Relationship Type	Track-URL	Recording-URL
Has Lyrics At Relationship Type	Track-URL	Work-URL
Has Score At Relationship Type	Track-URL	Work-URL
IBDb Relationship Type	Track-URL	Work-URL	TODO - but no ARs exist
IOBDb Relationship Type	Track-URL	Work-URL	TODO - but no ARs exist
Legal Representation Relationship Type	Track-URL	Recording-URL
Merchandising Provider Relationship Type	Track-URL	Recording-URL
Miscellaneous Role Relationship Type	Track-URL	Both
Paid Download Relationship Type	Track-URL	Recording-URL
Photography Relationship Type	Track-URL	Recording-URL
Publisher Relationship Type	Track-URL	Both
Recording Studio Relationship Type	Track-URL	Recording-URL
Samples From Relationship Type	Track-URL	Recording-URL	Samples refer to actual audio data.
Travel Agent Relationship Type	Track-URL	Recording-URL