EML mapping question.

[Christopher Jones]

David,

Here's my take, and I welcome any corrections if I've done any poor 
interpreting of EML constructs...

In short, you need eml-literature for your citation.

Here's the babbling answer:

Both eml-dataset and eml-literature are considered top level resources 
(as are eml-software and eml-protocol).  They extend the eml-resource 
schema by providing additional content that is dataset or literature 
(citation) specific.

In packages marked up with EML2.0.0beta6 and earlier, a literature 
document was "related" to a dataset document through the <triple> 
construct.  However, with further development of EML, the community has 
decided to replace the RDF-like triples by adopting the XMLSchema 
approach to relating XML trees to each other by  referencing 'id' 
attributes within a *single document* that uniquely identify a tree of 
elements.  This is  now done through the <additionalMetadata> tag, with 
it's <describes> child tag.

To mark up a single EML package (i.e. <eml> ...metadata and/or data ... 
</eml> that includes both a <dataset> tree and a <citation> tree, it 
would look something like the following (notice the id's and the 
namespace declarations, they are critical for validation):

<?xml version="1.0"?>
<eml:eml
    packageId="eml.1.1" system="knb"
    xmlns:eml="eml://ecoinformatics.org/eml-2.0.0rc3"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:ds="eml://ecoinformatics.org/dataset-2.0.0rc3"
    xmlns:stmml="http://www.xml-cml.org/schema/stmml"
    xsi:schemaLocation="eml://ecoinformatics.org/eml-2.0.0rc3 eml.xsd">

<dataset id="1555">

  <!-- all the required eml-dataset elements go in here ... -->

</dataset>
<additionalMetadata>
  <describes>
    1555
  </describes>
  <cit:citation id="345" scope="document"
            xmlns:cit="eml://ecoinformatics.org/literature-2.0.0rc3"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xsi:schemaLocation="eml://ecoinformatics.org/literature-2.0.0rc3
            eml-literature.xsd">

    <!-- all the required eml-literature elements go in here ... -->

  </cit:citation>
</additionalMetadata>
</eml:eml>

The semantic nature of the relationship between the two trees isn't 
explicitly stated, as was the intention of the whole <triple> approach, 
but I think that it can be inferred by the namespace declaration for the 
<citation> tag.  This lets processing systems know to treat the tree as 
a citation, and render it as such in some GUI app.

I've checked a sample document into CVS (in the eml/test directory) 
called eml-datasetWithCitation.xml that is a validating sample of what I 
think you may be asking for here.

Cheers,

Chris

David Blankman wrote:

> Below is a  metadata document from the McMurdo LTER site. In the 
> document they have a section called "CITATION".
> * CITATIONS: *Spaulding, Sarah A, Diane M. McKnight, Richard L. Smith 
> and Richard Dufford. 1994. Phytoplankton population dynamics in 
> perennially ice-covered Lake Fryxell, Antarctica. Journal of Plankton 
> Research. Vol.16 no.5 pp.527-541.
>
_________________________________________________________________
christopher jones     cjones at lifesci.ucsb.edu      (805) 893-5144
marine science institute  university of california, santa barbara
_________________________________________________________________