What to do with comments within <citation>?

[Daniel-Mietchen]

Just saw this at http://eutils.ncbi.nlm.nih.gov/entrez/eutils/efetch.fcgi?db=pmc&id=PMC1289384 :

<ref id="pcbi-0010052-b003">
  <citation citation-type="other">
    <person-group person-group-type="author">
      <name>
        <surname>Yang</surname>
        <given-names>UC</given-names>
      </name>
    </person-group>
    <year>2002</year>
    <source>A Ph.D degree bioinformatics program in Taiwan [abstract]. Workshop on Education in Bioinformatics; 2002 8 August; Edmonton, Canada. In Silico Biol
    </source>
    <!--Available: http://surya.bic.nus.edu.sg/web02/abstracts/yang.html. Accessed 3 November 2005.-->
  </citation>
</ref>
I do not understand why this is commented out, which causes it (rightfully so, I think) not to be included at https://en.wikisource.org/w/index.php?title=Wikisource:WikiProject_Open_Access/Programmatic_import_from_PubMed_Central/10.1371/journal.pcbi.0010052 .

In the HTML and PDF versions at PLOS, these comments are exposed, which makes sense to me. The PLOS XML has this:
```xml
<ref id="pcbi-0010052-b003">
  <label>3</label>
  <element-citation publication-type="other" xlink:type="simple">
    <person-group person-group-type="author">
      <name name-style="western">
        <surname>Yang</surname>
        <given-names>UC</given-names>
      </name>
    </person-group>
    <year>2002</year>
    <source>A Ph.D degree bioinformatics program in Taiwan [abstract]. Workshop on Education in Bioinformatics; 2002 8 August; Edmonton, Canada. In Silico Biol
    </source>
    <comment>Available: <ext-link ext-link-type="uri" xlink:href="http://surya.bic.nus.edu.sg/web02/abstracts/yang.html" xlink:type="simple">http://surya.bic.nus.edu.sg/web02/abstracts/yang.html</ext-link>. Accessed 3 November 2005.
    </comment>
  </element-citation>
</ref>

Is this a bug at PMC, a case for JATS4R or something else?

[Klortho]

I will inquire.

[Klortho]

This article is from 2005, and you can see that the NXML that you get from PMC uses the DTD "Journal Archiving and Interchange DTD v2.3 20070202". It doesn't match the XML you get from PLoS, which uses "Journal Publishing DTD v3.0 20080202".

Furthermore, v2.3 doesn't support the element in citations, which is probably why it was converted into an actual comment.

I guess there is a gap in the workflow somewhere that means that this newest XML from PLoS never got reloaded into the PMC archive. Not sure why -- I wrote to the help desk.