name attribute lost in <a> by -parse-raw html reader, since pandoc 1.16

name attribute lost in <a> by -parse-raw html reader, since pandoc 1.16

[john.r.rose-QHcLZuEGTsvQT0dZR+AlfA]

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I am parsing legacy HTML files that make heavy use of <a name=>.
I'm using -parse-raw to preserve as much HTML structure as possible.
(The result translates to a mix of pandoc-markdown and HTML fragments.)

Pandoc apparently mistreats <a name=> even in -parse-raw mode.  This feels 
like a bug.

Here's the behavior:

$ echo '<a name="anchor"/>hello world' | /usr/local/bin/pandoc-1.15.2 
--parse-raw -f html -t html
<a name="anchor"></a>hello world

$ echo '<a name="anchor"/>hello world' | /usr/local/bin/pandoc-1.16.0.2 
--parse-raw -f html -t html
<a href=""></a>hello world

(And so on, up to the present 1.18.)

If I use <a id="anchor"> instead, as a workaround, I get either <span 
id="anchor"> or <a href="" id="anchor">,
depending on release.  Those are OK, but they seem to be short of the mark 
also.

In any case, because I am working with legacy files, it would be unpleasant 
to preprocess the <a name=>
attributes to <a id=> attributes.

It would be pleasant for me if the pandoc authors agreed that the present 
behavior is a bug,
and made -parse-raw preserve the name attributes.

Comments?  Am I missing a workaround or a theory of operation?

Thanks.


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Re: name attribute lost in <a> by -parse-raw html reader, since pandoc 1.16

[John MacFarlane]

With pandoc 1.18:

% echo '<a name="anchor"/>hello world' | pandoc
<p><a name="anchor"/>hello world</p>

(Same thing with or without --parse-raw.) Is this what you expect?

+++ john.r.rose-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org [Nov 11 16 15:57 ]:
>   I am parsing legacy HTML files that make heavy use of <a name=>.
>   I'm using -parse-raw to preserve as much HTML structure as possible.
>   (The result translates to a mix of pandoc-markdown and HTML fragments.)
>   Pandoc apparently mistreats <a name=> even in -parse-raw mode.  This
>   feels like a bug.
>   Here's the behavior:
>   $ echo '<a name="anchor"/>hello world' | /usr/local/bin/pandoc-1.15.2
>   --parse-raw -f html -t html
>   <a name="anchor"></a>hello world
>   $ echo '<a name="anchor"/>hello world' | /usr/local/bin/pandoc-1.16.0.2
>   --parse-raw -f html -t html
>   <a href=""></a>hello world
>   (And so on, up to the present 1.18.)
>   If I use <a id="anchor"> instead, as a workaround, I get either <span
>   id="anchor"> or <a href="" id="anchor">,
>   depending on release.  Those are OK, but they seem to be short of the
>   mark also.
>   In any case, because I am working with legacy files, it would be
>   unpleasant to preprocess the <a name=>
>   attributes to <a id=> attributes.
>   It would be pleasant for me if the pandoc authors agreed that the
>   present behavior is a bug,
>   and made -parse-raw preserve the name attributes.
>   Comments?  Am I missing a workaround or a theory of operation?
>   Thanks.
>
>   --
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Re: name attribute lost in <a> by -parse-raw html reader, since pandoc 1.16

[john.r.rose-QHcLZuEGTsvQT0dZR+AlfA]

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On Friday, November 11, 2016 at 4:34:25 PM UTC-8, John MacFarlane wrote:
>
> With pandoc 1.18: 
>
> % echo '<a name="anchor"/>hello world' | pandoc 
> <p><a name="anchor"/>hello world</p> 
>
> (Same thing with or without --parse-raw.) Is this what you expect? 
>
>
Yes.  But then:
% echo '<a name="anchor"/>hello world' | /usr/local/bin/pandoc-1.18 -f html
<a href=""></a>hello world

The "-f html" does something surprising here. 

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Re: name attribute lost in <a> by -parse-raw html reader, since pandoc 1.16

[john.r.rose-QHcLZuEGTsvQT0dZR+AlfA]

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More info:

% echo '<a bozo="clown"/>hello world' | /usr/local/bin/pandoc-1.18 -f 
markdown -t html
<p><a bozo="clown"/>hello world</p>

So markdown input copies through HTML fragments without trying to 
understand them. But:

% echo '<a bozo="clown"/>hello world' | /usr/local/bin/pandoc-1.18 -f html 
-t html
<a href=""></a>hello world

The HTML reader apparently normalizes away the "name=" attribute of an <a> 
tag.

I filed https://github.com/jgm/pandoc/issues/3226

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