Klaus Rettinghaus

For now we should leave expressions as they are and just make sure other sorts of texts are actually exported.

Connected to #201

@lpugin When `` is used, there is no need for an additional ``. Question is: do one wants/needs to say, that there *is* a mixed key without bothering to encode...

see music-encoding/music-encoding#592 and music-encoding/music-encoding#598

Week 53 is existent and a valid ISO value. See https://en.wikipedia.org/wiki/ISO_week_date

Why should it throw an error if it is a valid ISO value and the correct date is returned? If you're not happy with this don't complain here, you should...

Copying a sentence from Wikipedia and adding "ISO says" is not a valid argument.

HTML errors/warnings * still `div` within `code` * `div` does not allow `xml:space="preserve"` * `script` may omit `type` attribute.

Over two years later I thought it would be a good time to test again. Same as before with on severe new one: * Duplicate ID `tipue_search_input`. See: https://validator.w3.org/nu/?doc=https%3A%2F%2Fmusic-encoding.org%2Fguidelines%2Fv4%2Felements%2Fbarline.html

My comment [above](https://github.com/music-encoding/guidelines/issues/47#issuecomment-444462438) has lost none of its relevance.