Citing other eprints

eprint_render.pl

if ( $eprint->is_set("parent") )
{
        my $parentid = $eprint->get_value("parent");
        my $dataset = $repository->dataset( "eprint" );
        my $dobj = $dataset->dataobj($parentid);

        my $parent_citation = $repository->make_element( "div", class => "panel panel-info" );

        my $citation_header = $repository->make_element( "div", class => "panel-heading" );
        my $citation_title = $repository->make_element( "h3", class => "panel-title" );
        my $citation_titletext = $repository->make_text( "This dataset is part of a collection" );
        $citation_title->appendChild( $citation_titletext );
        $citation_header->appendChild( $citation_title );
        $parent_citation->appendChild( $citation_header);

        my $citation_body = $repository->make_element( "div", class => "panel-body" );
        if ( $eprint->exists_and_set( "doi" ) ) {
                my $citation_content = $repository->make_text( "Cite the collection as:" );
                $citation_body->appendChild( $citation_content );

                my $citation_text = $repository->make_element( "p", class => "ghostly", style => "width:100%;" );
                my $citation_link = $repository->make_element( "a", class => "ghostly", style => "display:block;height:100%; padding-top:15px; padding-bottom:15px;margin-top:-15px;margin-bottom:-15px;" );
                my $citation_linkurl =  $repository->config( "base_url" ) .
                                        '/id/eprint/' .
                                        $parentid;
                $citation_link->setAttribute( 'href', $citation_linkurl );
                $citation_link->setAttribute( 'target', "_blank" );

                $citation_link->appendChild( $dobj->render_citation( "ubdata" ) );
                $citation_text->appendChild( $citation_link );
                $citation_body->appendChild( $citation_text );

                my $childcitation_content = $repository->make_text( "Cite this dataset as:" );
                $citation_body->appendChild( $childcitation_content );

                my $childcitation_text = $repository->make_element( "p", class => "ghostly", style => "width:100%;" );
                my $childcitation_link = $repository->make_element( "a", class => "ghostly", style => "display:block;height:100%; padding-top:15px; padding-bottom:15px;margin-top:-15px;margin-bottom:-15px;", href => "#" );

                $childcitation_link->appendChild( $eprint->render_citation( "ubdata" ) );
                $childcitation_text->appendChild( $childcitation_link );
                $citation_body->appendChild( $childcitation_text );
        } else {

                my $citation_content = $repository->make_text( "Please cite this dataset as:" );
                $citation_body->appendChild( $citation_content );

                my $citation_text = $repository->make_element( "p", class => "ghostly", style => "width:100%;" );
                my $citation_link = $repository->make_element( "a", class => "ghostly", style => "display:block;height:100%; padding-top:15px; padding-bottom:15px;margin-top:-15px;margin-bottom:-15px;" );
                my $citation_linkurl =  $repository->config( "base_url" ) .
                                        '/id/eprint/' .
                                        $parentid;
                $citation_link->setAttribute( 'href', $citation_linkurl );
                $citation_link->setAttribute( 'target', "_blank" );

                $citation_link->appendChild( $dobj->render_citation( "ubdata" ) );
                $citation_text->appendChild( $citation_link );
                $citation_body->appendChild( $citation_text );
        }

        $parent_citation->appendChild( $citation_body );

        $fragments{parent_citation} = $parent_citation;

}

summary_page.xml

    <epc:choose>
	    <epc:when test="parent">
		<epc:print expr="$parent_citation" />
	    </epc:when>
	    <epc:otherwise>
		<epc:print expr="$item.citation('ubdata')" />
	    </epc:otherwise>
    </epc:choose>