remove media type registrations

[samuelweiler]

These were done in the level 3 spec and do not need to be repeated here. It would be appropriate to point out that this version (re-)uses these media types, which were previously registered, but we don't need to repeat the template again here. (and, indeed, repeating it could lead to confusion).

[davidcarlisle]

I raised one concern in the charter issue where this was raised.

Agreed we do not want to make a new media type registration so the current text is not suitable (like most of the document it is simply a copy of MathML3 until we really work on updating the text).

My concern would be if we decide to make MathML3 marked as obsolete after MathML4 is published. The media type appendix should not be marked as obsolete. If MathML4 is not the best location I don't know if it is possible to split it into a self standing document separate from either MathML3 or MathML4? Possibly other WG that have media type registrations via W3C REC have already faced this issue?

[samuelweiler]

I think it's fine for an IANA registry to point at an obsolete doc, so long as the doc is still available. And it's fine to sort this out later.

[fred-wang]

@NSoiffer @davidcarlisle I believe this was originally for https://w3c.github.io/mathml/ and should not have been transferred to the mathml-core repo ? I guess it's referring to https://w3c.github.io/mathml/#media-types-reg ?

[davidcarlisle]

@fred-wang yes I'll move it back to an issue on the mathml4 spec

[davidcarlisle]

@samuelweiler @NSoiffer @polx Just referencing some discussion at

#299 (comment)

as PR comments more easily lost than issue links,

It seems other W3C media registrations (notably SVG) effectively end up referencing the current version of the specification which seems preferable in the long run than referencing a specification that has been superseded.

[davidcarlisle]

Referencing obsolete versions does have some issues though, for example XSLT 3 just references the XSLT2 media type registration

https://www.w3.org/TR/xslt-30/#xslt-mime-definition

But the URL given there (and at the IANA registraion for application/xslt-xml) is

https://www.w3.org/TR/2007/REC-xslt20-20070123/#media-type-registration

But this is an obsoleted document that produces the dialog

It would be good if we could arrange with IANA to give a stable document that just has the registration without being tied to a versioned mathml x.y rec, then we could reference that from MathML 4, ie change the MathML3 links listed at

https://www.iana.org/assignments/media-types/media-types.xhtml#application

[polx]

Request to IETF-types sent.

[polx]

An answer came quickly by Martin Dürst: it is all possible to update and we apply the same process as the registration. That means that we can keep the appendix and a (maybe reduced) part of chapter 6.

[davidcarlisle]

media types have been removed from Mathml4 document and the text from MathML3 is being moved to a new document independent of mathml version: https://www.w3.org/TR/mathml-media-types/