linking from full mathml4 spec to mathml core

I added some markup to add links from the full spec to core, for any 
element or attribute

https://mathml-refresh.github.io/mathml/chapter3.html#presm.mspace


The exact classifications of in/out of core are not right currently: 
I'll make a pass over the current core draft to get them closer, but 
currently just experimenting with the markup required.

The new <coreref/> element in the xml source currently allows either 
type=no (if not in core) or ref="<someid>" if it is in core, which makes 
a link to the mathml-core spec see

https://mathml-refresh.github.io/mathml/chapter3.html#presm.mspace


where the core✔ in the heading takes you to

https://mathml-refresh.github.io/mathml-core/index.html#mspace


more classifications could be imagined such as ("restricted version in 
core" or "not in core but polyfill available" or "not in core and 
deprecated in full" etc, but not today)

I think we need some formalised linking between the documents, but this 
is just a trial, comments welcome and I can back it out if people don't 
like it.

David

Disclaimer

The Numerical Algorithms Group Ltd is a company registered in England and Wales with company number 1249803. The registered office is:
Wilkinson House, Jordan Hill Road, Oxford OX2 8DR, United Kingdom.

This e-mail has been scanned for all viruses and malware, and may have been automatically archived by Mimecast Ltd, an innovator in Software as a Service (SaaS) for business.