Updated draft specification

Hi,

Following some of the feedback from the last hangout I've updated the
modelling specification to make a number of revisions to the key concepts.

Specifically I have:

* Provided more detail on Activities and Activity lists, to hopefully
clarify more of the model
* Replaced "Programme" with "Format", partly because the term seems to be
used in different ways
* Updated definition of places, venues and equipment

There's still plenty to do in terms of adding more examples and details of
properties, as well as a schema diagram, but I wanted to share this as soon
as possible. I'd like to focus on the activities, event and scheduling data
on our next call.

https://www.openactive.io/modelling-opportunity-data/#key-concepts

If you have feedback in the meantime, then please do share your comments
with the group.

Have a great weekend!

Cheers,

L.

-- 
Leigh Dodds, Senior Consultant, theODI.org
@ldodds
The ODI, 65 Clifton Street, London EC2A 4JE