On Monday, November 14, 2016 at 9:38:48 AM UTC-5, BP wrote:
>
> One possible problem with including metadata as YAML is that it may become 
> harder for filters earlier in the chain to query the metadata or inject a 
> CSV block using the normal attribute interface, if any, of the filter 
> engine, not to mention parsing the CSV, query or alter it and write it 
> back. For that reason I think it be better if the content of the code block 
> is the pure CSV data. FWIW I tried both strategies with my unpublished 
> filters, so I'm not just speculating. 
>
> Also since there are many filters doing the same thing the identifying 
> class should better not be just `csv` but also identify the filter expected 
> to handle the data.
>

Sorry, I don't understand what is the problem. CSV blocks are not a 
standard feature of Pandoc, and each filter has its own conventions, so I 
don't think is reasonable to expect a new filter to allow its data to be 
queried/exposed to other, unknown filters.

About having additional information besides the raw CSV, I think it's 
actually the most important thing, because it allows you to have a title, 
to load CSV from external sources, add footnotes, and specify output 
options, all of which wouldn't be possible if we restricted the content to 
be some CSV-delimited info.

Finally, I do agree that having a filter named "csv" or "pandoc-csv" might 
collide with existing filters, but I don't think there is a problem with 
having a csv class. I think the chance that a user ends up requiring two 
different filters that use CSV code blocks is low enough for this to be a 
non-issue.

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