YANG inspirations for TD

Hi all,

There is and ongoing discussion about thing description (TD). I'd like to
point community to YANG modelling language (
https://tools.ietf.org/html/rfc6020 ) . YANG is built to address very same
requirements as TD. It has updatable properties, rpc`s, event streams, data
types etc.

However even YANG is complex language and out of W3C standards it has some
interesting concepts which can serve as an inspiration for next TD version.
I mean mainly:

- hierachical data model (helps in model maintainability and supports
contexts)
- value constraints (great help at UI generation, widget design and reduces
network traffic)
- interaction types concept (good for extensibility)

Hope helps a bit.

Robert