Cross-references between index entries

Capture cross-references between index entries using an xrefGrp group, with the target entry inside an xref element and introductory text (e.g. "see also" or "see under") outside the xref but inside the xrefGrp.

The target element of the xref should be the indexItem[1-4,N]

Where [1-4,N] represents one of 1, 2, 3, 4, or N.

elements whose iHeadword contains the target text.

References in an index can link to to page numbers as cross-references.

When the index item refers to multiple, unspecified entries (e.g. "see specific countries", "see also individual politicians") do not use an xrefGrp, because there will be no valid target for the xref.

media/OUP_Struct_Txt_3_9_6_image_1.png


      <xrefGrp>
             <i>see also</i>
        <xref ref="med-9780195169713-indexItem1-165">fractures</xref>
         </xrefGrp>

Example of index item referring to a non-cross-referenceable entity.


      <indexItem2 id="oso-9780199662685-indexItem2-310">
             <iHeadword>safety testing</iHeadword>
        <pageNum pageId="363">
                 <xref ref="oso-9780199662685-chapter-16-milestone-363">363</xref>
             </pageNum>
        <xrefGrp>
                 <i>see also</i><xref ref="oso-9780199662685-indexItem2-246">medical use</xref>
             </xrefGrp>; and specific
        drugs/uses</indexItem2>

media/OUP_Struct_Txt_3_9_6_image_3.png


      <indexItem1 id="med-9780198530374-indexItem1-29">
        <iHeadword>anaesthesia</iHeadword>
        <xrefGrp>see <xref ref="med-9780198530374-indexItem1-475">ocular anaesthesia</xref>
        </xrefGrp>
      </indexItem1>

When references occur to nested index items, capture the text of the full reference, including terms at all index levels within xref. The target element should be the most specific indexItem[1-4,N] referenced.

media/OUP_Struct_Txt_3_9_6_image_4.png


      <indexItem2 id="law-9780199685608-indexItem2-1054">
        <iHeadword>market abuse</iHeadword>
        <xrefGrp>see <xref ref="law-9780199685608-indexItem2-473">
                     <b>market abuse:</b> UK civil
            market abuse regime</xref>; <xref ref="law-9780199685608-indexItem2-474">
                     <b>market
              abuse:</b> UK criminal regime</xref>
        </xrefGrp>
      </indexItem2>