From: Marc Cromme <marc@indexdata.dk>
Date: Fri, 24 Feb 2006 14:07:23 +0000 (+0000)
Subject: added some examples of XMLPQF to XMLPQF query rewrites
X-Git-Tag: YAZ.2.1.14~18
X-Git-Url: http://git.indexdata.com/?p=yaz-moved-to-github.git;a=commitdiff_plain;h=c66f4dda30f7cb8b7d1c8503cc2eb75251187c3d

added some examples of XMLPQF to XMLPQF query rewrites
look in the first comments of the stylesheet to see how it is run.
probably this is the wrong place, but I checked it in here since I do not know of a better place.
---

diff --git a/util/pqf2pqf.xsl b/util/pqf2pqf.xsl
new file mode 100644
index 0000000..0457714
--- /dev/null
+++ b/util/pqf2pqf.xsl
@@ -0,0 +1,150 @@
+<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
+  version="1.0">
+
+  <xsl:output indent="yes" method="xml" version="1.0" encoding="UTF-8"/>
+
+  <!--
+./yaz-xmlquery -p '@and @attr 1=1016 @attr 4=2 @attr 6=3 the @attr 1=4 fish' > test.xml && xsltproc identity.xsl test.xml && ./yaz-xmlquery -x test1.xml && xsltproc pqf2pqf.xsl test.xml |tee test2.xml && ./yaz-xmlquery -x test2.xml 
+
+./yaz-xmlquery -p '@not @attr 1=1016 @attr 4=2 @attr 6=3 @attr 7=1 @attr 8=4 fish @attr 1=4 fish' > test.xml && xsltproc identity.xsl test.xml && ./yaz-xmlquery -x test.xml && xsltproc pqf2pqf.xsl test.xml |tee test2.xml && ./yaz-xmlquery -x test2.xml 
+  -->
+
+  <!-- disable default templates -->
+  <xsl:template match="text()"/>
+  <xsl:template match="node()"/>
+
+  <!-- identity stylesheet templates -->
+  <xsl:template match="/query">
+    <query>
+      <xsl:apply-templates/>
+    </query>
+  </xsl:template>
+
+  <xsl:template match="rpn">
+    <rpn>
+      <xsl:attribute name="set">
+        <xsl:value-of  select="@set"/>
+      </xsl:attribute>
+      <xsl:apply-templates/>
+    </rpn>
+  </xsl:template>
+
+
+  <xsl:template match="apt">
+    <apt>
+      <xsl:apply-templates select="attr"/>
+      <xsl:apply-templates select="term"/>
+      <!-- re-ordering @attr's if you use the following -->
+      <!--
+      <xsl:apply-templates select="attr[@type=1]"/>
+      <xsl:apply-templates select="attr[@type=2]"/>
+      <xsl:apply-templates select="attr[@type=4]"/>
+      <xsl:apply-templates select="attr[@type=5]"/>
+      <xsl:apply-templates select="attr[@type=6]"/>
+      <xsl:apply-templates select="attr[@type=7]"/>
+      <xsl:apply-templates select="attr[@type=8]"/>
+      <xsl:apply-templates select="attr[@type=9]"/>
+      <xsl:apply-templates select="term"/>
+      -->
+    </apt>
+  </xsl:template>
+
+  <xsl:template match="operator">
+    <operator>
+      <xsl:attribute name="type">
+        <xsl:value-of  select="@type"/>
+      </xsl:attribute>
+      <xsl:apply-templates/>
+    </operator>
+  </xsl:template>
+
+  <xsl:template match="attr">
+    <xsl:copy-of select="."/>
+  </xsl:template>
+
+  <xsl:template match="term">
+    <xsl:copy-of select="."/>
+  </xsl:template>
+
+
+  <!-- special rewrite templates -->
+
+  <!-- attribute rewrites --> 
+
+  <!-- remove all @attr 6=3 with bracket syntax -->
+  <xsl:template match="attr[@type=6][@value=3]">
+  </xsl:template>
+
+  <!-- remove all @attr 6=4 with and syntax -->
+  <xsl:template match="attr[@type=6 and @value=4]">
+  </xsl:template>
+
+  <!-- rewrite all @attr 4=2 to @attr 4=1 -->
+  <xsl:template match="attr[@type=4][@value=2]">
+    <attr type="4" value="1"/>
+  </xsl:template>
+
+  <!-- rewrite all @attr 1=1016 to @attr 1=1016 @attr 6=2 -->
+  <xsl:template match="attr[@type=1 and @value=1016]">
+    <attr type="1" value="1016"/>
+    <attr type="6" value="2"/>
+  </xsl:template>
+
+
+
+  <!-- term rewrites -->
+
+  <!-- rewrite general term fish to squid -->
+  <xsl:template match="term[@type='general'][text()='fish']">
+    <term type="general">squid</term>
+  </xsl:template>
+
+
+  <!-- operator rewrites -->
+  <!-- nasty rewrite 'not' operator to 'and' operator -->
+  <!--
+  <xsl:template match="operator[@type='not']">
+    <operator>
+      <xsl:attribute name="type">
+        <xsl:value-of  select="'and'"/>
+      </xsl:attribute>
+      <xsl:apply-templates/>
+    </operator>
+  </xsl:template>
+  -->
+
+  <!-- remove 'not' operator, use first <apt> only -->
+  <xsl:template match="operator[@type='not']">
+    <xsl:apply-templates select="apt[1]"/>
+  </xsl:template>
+  
+
+
+  <!-- more nasty things for special occasions 
+       depending on multiple attribute combinations -->
+
+  <!-- whenever there is a <apt> containing a @attr 7 and a @attr 8,
+       rewrite these and drop all @attr 3, 
+       finally sort all other @attrs according to type 
+       and call all terms, still rewriting 'fish' to 'squid' -->
+ 
+ <xsl:template match="apt[attr/@type=7 and attr/@type=8]">
+   <apt>
+      <xsl:apply-templates select="attr[@type=1]"/>
+      <xsl:apply-templates select="attr[@type=2]"/>
+      <xsl:apply-templates select="attr[@type=4]"/>
+      <xsl:apply-templates select="attr[@type=5]"/>
+      <xsl:apply-templates select="attr[@type=6]"/>
+      <attr type="7" value="2"/>
+      <attr type="8" value="5"/>
+      <xsl:apply-templates select="attr[@type=9]"/>
+      <xsl:apply-templates select="term"/>
+   </apt>
+  </xsl:template>
+
+
+
+
+</xsl:stylesheet>
+
+