Fwd: Can math elements have attributes

[A A <amine.aboufirass-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

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Dear all,

Having not received a response to my query below, I ran a few of my own
tests to try to understand what is going on.

It seems that commonmark_x *does* recognize attributes for both inline and
display math. If I have the following in my markdown file:

$$x = 1+2$${ .cs #math:equation caption=test}

$x = 1+2${ .cs #math:equation caption=test}

~~~{
  .cs
  #lst:my-listing
  caption=test
  }
def f(x):
    return x
~~~

And I run pandoc --from commonmark_x --to native test.md I will get the
following:

[ Para
    [ Span
        ( "math:equation" , [ "cs" ] , [ ( "caption" , "test" ) ] )
        [ Math DisplayMath "x = 1+2" ]
    ]
, Para
    [ Span
        ( "math:equation" , [ "cs" ] , [ ( "caption" , "test" ) ] )
        [ Math InlineMath "x = 1+2" ]
    ]
, CodeBlock
    ( "" , [ "{" ] , [] )
    "  .cs \n  #lst:my-listing \n  caption=test\n  }\ndef f(x):\n    return x"
]

Notice that the multiline attributes for the CodeBlock element are not
picked up. If I instead try pandoc --from markdown --to native test.md:

[ Para
    [ Math DisplayMath "x = 1+2"
    , Str "{"
    , Space
    , Str ".cs"
    , Space
    , Str "#math:equation"
    , Space
    , Str "caption=test}"
    ]
, Para
    [ Math InlineMath "x = 1+2"
    , Str "{"
    , Space
    , Str ".cs"
    , Space
    , Str "#math:equation"
    , Space
    , Str "caption=test}"
    ]
, CodeBlock
    ( "lst:my-listing" , [ "cs" ] , [ ( "caption" , "test" ) ] )
    "def f(x):\n    return x"
]


The attributes in the CodeBlock element *are* picked up, but the attributes
for display and inline math are not.

Unfortunately, for my use case I would like to be able to assign multiline
attributes to code block elements *and* assign attributes to display and
inline math elements.

Is there a way to achieve both in the same markdown file? Thanks for your
consideration.

Regards,

Amine

---------- Forwarded message ---------
From: A A <amine.aboufirass-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Date: Wed, 8 Feb 2023 at 13:52
Subject: Can math elements have attributes
To: <pandoc-discuss-/JYPxA39Uh5TLH3MbocFFw@public.gmane.org>


Dear all,

I am writing my own pandoc to latex converter using panflute and would like
to attach attributes to Math elements. I have tried the following syntax,
but it seems that the attribute is not being picked up by panflute:

```
$$x=y$${ a=b }
```

I did some of my own research to figure out what I was doing wrong. And a
couple of things became apparent:

- On the one hand, it looks like pandoc might not support this:
    - https://github.com/jgm/pandoc/issues/684
    - https://github.com/jgm/pandoc/issues/5286
- On the other hand, `pandoc-crossref` seems to be able to handle this
syntax:
    - https://github.com/lierdakil/pandoc-crossref
    - https://lierdakil.github.io/pandoc-crossref/#equation-labels

Is this currently supported by pandoc? If not then how is `pandoc-crossref`
able to handle it? Thanks for your consideration.

Regards,

Amine

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