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Re: [EP-tech] epc and citation templates


It’s trivial to do using Lizz’s example – or look at the default code for rendering multiple versions – calculate in perl, check for a $flags{something} in the epc.


There is a possibly useful method in EPrints::Script::Compiled (which seems to have escaped the clutches of documentation):



I’ve never used it, no one’s ever written about it (as far as I can see, other than a mention in release notes).

*If* it works, you probably want something like this:

  <epc:if test=”$item.filter_compound_list( 'locationelectronic', 'type', 'url' ).length = 0">

     <!-- print your message -->



Also, if it does work, shall we add some documentation about it somewhere?





From: eprints-tech-bounces@ecs.soton.ac.uk [mailto:eprints-tech-bounces@ecs.soton.ac.uk] On Behalf Of Matthew Brady
Sent: 30 June 2016 07:24
To: eprints-tech@ecs.soton.ac.uk
Subject: Re: [EP-tech] epc and citation templates


Hi again J


More summary page citation rendering goodness…     Is there a way to display a message if something doesn’t occur, using the epc script constructs…


e.g. in this code snippet…


<epc:foreach expr="locationelectronic" iterator="le">

       <epc:if test="$le{type} = 'url'">

              <li><a target="_top" href="//{$le{textual}}"><epc:print expr="$le{textual}" /></a></li><br/>




If we have urls stored, then render them out… but if after looping through all the records, none of them were urls, then I want to display a message with some generic contact details…








From: eprints-tech-bounces@ecs.soton.ac.uk [mailto:eprints-tech-bounces@ecs.soton.ac.uk] On Behalf Of Matthew Brady
Sent: Wednesday, 29 June 2016 1:36 PM
To: eprints-tech@ecs.soton.ac.uk
Subject: Re: [EP-tech] epc and citation templates


Thanks for the feedback…


I tried to re-wrangle the EPrints::Script::Compiled with a new method, but it complained about undefined values, and it just didn’t want to play nicely…


The data I was using was originally a field inside a compound,  I have updated the field definitions so its now a multiplele itemref field, not inside a compound type.

And now it is working…  


I will work on Lizz’s ideas as well, to get something that’s going to suit this project, and let you know how it all works out when its done.






From: eprints-tech-bounces@ecs.soton.ac.uk [mailto:eprints-tech-bounces@ecs.soton.ac.uk] On Behalf Of John Salter
Sent: Tuesday, 28 June 2016 9:22 PM
To: eprints-tech@ecs.soton.ac.uk
Subject: Re: [EP-tech] epc and citation templates


Hi Matt,

How do you get your list of related EPrintIDs?

Are they stored in a field, or calculated dynamically?


Lizz’s suggestion is good.

If you *really* want to constrain yourself to use logic in the citation files, you will need to inject some extra methods into the EPrints::Script::Compiled module *unless* your EPrintIDs are stored in an ‘Itemref’ field.

If they’re in an Itemref field, you can use the ‘as_item’ method.


If they’re not, you can add something like (pseudo code!)

package EPrints::Script::Compiled

sub run_datasetid_and_id_to_dataobj


   my( $self, $state, $datasetid, $id) = @_;


  # turn $datasetid and $id into a dataobj


  # return [ $dataobj ];



And then use <epc:print expr=”datasetid_and_id_to_dataobj( ‘eprint’, $eprintid ).citation(‘default’)” />


An example of this technique at the end of this file: http://bazaar.eprints.org/207/1/epm/containers/cfg/cfg.d/z_containers.pl






From: eprints-tech-bounces@ecs.soton.ac.uk [mailto:eprints-tech-bounces@ecs.soton.ac.uk] On Behalf Of Lizz Jennings
Sent: 28 June 2016 10:18
To: eprints-tech@ecs.soton.ac.uk
Subject: Re: [EP-tech] epc and citation templates


You can write a render method in eprint_render.pl (or wherever you have that configuration as it can be overridden).


I’ve used this as I have created a parent-child functionality, but you could obviously adapt this to what you were wanting to include.




(and sorry for all the embedded styles in there, it’s a temporary measure…)


You write the code to a fragment, and can then include the fragment in the summary_page.xml file.





Lizz Jennings BA MSc ACLIP MCLIP (Revalidated 2015)

Technical Data Officer

The Library 4.10, University of Bath, Bath, BA2 7AY UK

Ext. 3570 (External 01225 383570)


Research Data Management: http://www.bath.ac.uk/research/data


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