Improved author indexing

- Added missing author_sort values to XSLT indexing.
- Added DC:contributor support to VuDL indexing.

import/xsl/doaj.xsl

@@ -68,6 +68,12 @@
                             <field name="author">
                                 <xsl:value-of select="normalize-space()"/>
                             </field>
+                            <!-- use first author value for sorting -->
+                            <xsl:if test="position()=1">
+                                <field name="author_sort">
+                                    <xsl:value-of select="normalize-space()"/>
+                                </field>
+                            </xsl:if>
                         </xsl:if>
                     </xsl:for-each>
                 </xsl:if>

import/xsl/dspace.xsl

@@ -100,6 +100,12 @@
                             <field name="author">
                                 <xsl:value-of select="normalize-space()"/>
                             </field>
+                            <!-- use first author value for sorting -->
+                            <xsl:if test="position()=1">
+                                <field name="author_sort">
+                                    <xsl:value-of select="normalize-space()"/>
+                                </field>
+                            </xsl:if>
                         </xsl:if>
                     </xsl:for-each>
                 </xsl:if>

import/xsl/gsdl.xsl

@@ -84,6 +84,12 @@
                             <field name="author">
                                 <xsl:value-of select="normalize-space()"/>
                             </field>
+                            <!-- use first author value for sorting -->
+                            <xsl:if test="position()=1">
+                                <field name="author_sort">
+                                    <xsl:value-of select="normalize-space()"/>
+                                </field>
+                            </xsl:if>
                         </xsl:if>
                     </xsl:for-each>
                 </xsl:if>

import/xsl/ndltd.xsl

@@ -161,6 +161,12 @@
                             <field name="author">
                                 <xsl:value-of select="normalize-space()"/>
                             </field>
+                            <!-- use first author value for sorting -->
+                            <xsl:if test="position()=1">
+                                <field name="author_sort">
+                                    <xsl:value-of select="normalize-space()"/>
+                                </field>
+                            </xsl:if>
                         </xsl:if>
                     </xsl:for-each>
                 </xsl:if>

import/xsl/nlm_ojs.xsl

@@ -134,11 +134,17 @@
 
                 <!-- AUTHOR -->
                 <xsl:for-each select="//nlm:contrib[@contrib-type='author']/nlm:name">
-                        <xsl:if test="normalize-space()">
-                            <field name="author">
-                                <xsl:value-of select="nlm:surname[normalize-space()]" />, <xsl:value-of select="nlm:given-names[normalize-space()]" />
+                    <xsl:if test="normalize-space()">
+                        <field name="author">
+                            <xsl:value-of select="nlm:surname[normalize-space()]" />, <xsl:value-of select="nlm:given-names[normalize-space()]" />
+                        </field>
+                        <!-- use first author value for sorting -->
+                        <xsl:if test="position()=1">
+                            <field name="author_sort">
+                                <xsl:value-of select="normalize-space()"/>
                             </field>
                         </xsl:if>
+                    </xsl:if>
                 </xsl:for-each>
 
                 <!-- TITLE -->

import/xsl/ojs.xsl

@@ -62,6 +62,12 @@
                             <field name="author">
                                 <xsl:value-of select="normalize-space()"/>
                             </field>
+                            <!-- use first author value for sorting -->
+                            <xsl:if test="position()=1">
+                                <field name="author_sort">
+                                    <xsl:value-of select="normalize-space()"/>
+                                </field>
+                            </xsl:if>
                         </xsl:if>
                     </xsl:for-each>
                 </xsl:if>

import/xsl/vudl_FOXML.xsl

@@ -389,6 +389,22 @@ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                             <field name="author">
                                 <xsl:value-of select="normalize-space()"/>
                             </field>
+                            <!-- use first author value for sorting -->
+                            <xsl:if test="position()=1">
+                                <field name="author_sort">
+                                    <xsl:value-of select="normalize-space()"/>
+                                </field>
+                            </xsl:if>
+                        </xsl:if>
+                    </xsl:for-each>
+                </xsl:if>
+
+                <xsl:if test="$DC//dc:contributor">
+                    <xsl:for-each select="$DC//dc:contributor">
+                        <xsl:if test="normalize-space()">
+                            <field name="author2">
+                                <xsl:value-of select="normalize-space()"/>
+                            </field>
                         </xsl:if>
                     </xsl:for-each>
                 </xsl:if>