Prevent spurious warnings on attempting access to child axis of text() or attributes

[rjelliffe]

From Sebastian Rahtz
I am reading iso_schematron_skeleton_for_saxon.xsl, with lots of DPC good bits.

My problem is that when we have rules which match text() or attributes, we get
fake warnings like:

     [xslt] /Users/rahtz/TEI/Sourceforge/trunk/P5/Exemplars/tei_jtei.xsl:1605: Warning! The child axis starting at an attribute node will never select anything

from a generated “apply-template select=‘*’”

My crude fix is below, if you’re interested. I can’t really tell whether this code is maintained somewhere formal?

--- ../Utilities/iso_schematron_skeleton_for_saxon.xsl  (revision 13161)
+++ ../Utilities/iso_schematron_skeleton_for_saxon.xsl  (working copy)
@@ -1638,11 +1638,20 @@
                                        <xsl:with-param name="subject" select="@subject" />
                        </xsl:call-template>

-
-                       <xsl:apply-templates/>
-                       <!-- DPC introduce context-xpath and select-contexts variables -->
-                       <xsl:if test="not($select-contexts)">
-                         <axsl:apply-templates select="{$context-xpath}" mode="M{count(../preceding-sibling::*)}"/>
+                         <xsl:apply-templates/>
+                         <!-- DPC introduce context-xpath and select-contexts variables -->
+                         <xsl:if test="not($select-contexts)">
+                           <xsl:choose>
+                           <xsl:when
+                               test="starts-with(@context,'text(')"/>
+                           <xsl:when
+                               test="starts-with(@context,'@')"/>
+                           <xsl:otherwise>
+                             <axsl:apply-templates
+                                 select="{$context-xpath}"
+                             mode="M{count(../preceding-sibling::*)}"/>
+                           </xsl:otherwise>
+                           </xsl:choose>
                        </xsl:if>
                </axsl:template>

[rjelliffe]

A note Rick made perhaps relating to this:

At end of handling PATTERN has

xsl:commentHousekeeping: SAXON warns if attempting to find the attribute of an attribute</xsl:comment>

          <axsl:when test="not(@*)">

but @* will not test if current node is attribute (or /).

So this should be (self::*) because an element is the only thing that can recurse.

[rjelliffe]

N.b. I have complained in the past to Saxonica that they generate spurious warning messages. It is maddening. But SAXON is a great product.