*** previous/relative-filters.xml	2008-09-28 14:59:48.000000000 +1000
--- current/relative-filters.xml	2008-12-15 11:29:28.000000000 +1100
***************
*** 159,179 ****
            <xtermref bibref="VARIABLES" idref="term-variable-set">variable set</xtermref> 
            being evaluated.
          </p>
  
          <p>
            The aspects that are matched by a relative filter are determined by the
            <xtermref bibref="VARIABLES" idref="term-aspect-model">aspect model</xtermref> 
            of the variable set.  
          </p>
-         
- 
  
          <p>
            The XPath expression implied by a relative filter is 
            constructed as an 
!           <xtermref bibref="XPATH2" idref="doc-xpath-AndExpr">
!           and-expression
!           </xtermref>
            from the implied XPath expressions of the matching filters 
            <bibref ref="MATCHFILTERS"/> that match each of the aspects 
            in the variable set's aspect model that can be covered by 
--- 159,190 ----
            <xtermref bibref="VARIABLES" idref="term-variable-set">variable set</xtermref> 
            being evaluated.
          </p>
+         
+         <p>
+           If the fact variable identified by the <att>variable</att> attribute on
+           the relative filter has evaluated to a <xtermref bibref="VARIABLES" idref="">fallback value</xtermref> 
+           then the implied XPath expression for the relative filter is:
+         </p>
+ 
+         <p>
+           <code>fn:false()</code>
+         </p>
+         
+         <p>
+           Otherwise the implied XPath expression for the relative filter
+           is obtained as set out below.
+         </p>
  
          <p>
            The aspects that are matched by a relative filter are determined by the
            <xtermref bibref="VARIABLES" idref="term-aspect-model">aspect model</xtermref> 
            of the variable set.  
          </p>
  
          <p>
            The XPath expression implied by a relative filter is 
            constructed as an 
!           <xtermref bibref="XPATH2" idref="doc-xpath-AndExpr">and-expression</xtermref>
            from the implied XPath expressions of the matching filters 
            <bibref ref="MATCHFILTERS"/> that match each of the aspects 
            in the variable set's aspect model that can be covered by 
***************
*** 188,198 ****
  
          <p>
            For aspect models that include 
!           <xtermref bibref="VARIABLES" idref="term-segment-dimension-aspect">segment dimension aspects</xtermref>
!           or
!           <xtermref bibref="VARIABLES" idref="term-scenario-dimension-aspect">scenario dimension aspects</xtermref>
            the implied value of the <att>dimension</att> attribute
!           for each of the segment or scenario dimension matching filters 
            is equal to the QName of the dimension that is being matched.
          </p>
  
--- 199,207 ----
  
          <p>
            For aspect models that include 
!           <xtermref bibref="VARIABLES" idref="term-dimension-aspect">dimension aspects</xtermref>
            the implied value of the <att>dimension</att> attribute
!           for each of the dimension matching filters 
            is equal to the QName of the dimension that is being matched.
          </p>
  
***************
*** 333,339 ****
                          The use of a non-dimensional aspect model would make this variable set innappropriate
                          for use with XBRL instances that make use of XBRL Dimensions <bibref ref="DIMENSIONS"/> because
                          matching of segments and scenarios would not take subtleties relating to comparison of 
!                         XBRL Dimension values into account.
                        </footnote>
                      </item>
                    </ulist>
--- 342,348 ----
                          The use of a non-dimensional aspect model would make this variable set innappropriate
                          for use with XBRL instances that make use of XBRL Dimensions <bibref ref="DIMENSIONS"/> because
                          matching of segments and scenarios would not take subtleties relating to comparison of 
!                         XBRL dimension values into account.
                        </footnote>
                      </item>
                    </ulist>
***************
*** 497,502 ****
--- 506,542 ----
            </p>
          </revision>
  
+         <revision ref="person-geoff" day="12" month="08" year="2008">
+           <p>
+             Defined the implied XPath expression for the case where the 
+             variable identified by the <att>variable</att> attribute of 
+             the relative filter has evaluated to a fallback value. 
+           </p>
+         </revision>
+ 
+         <revision ref="person-geoff" day="27" month="08" year="2008">
+           <p>
+             Collapsed the segment dimension and scenario dimension
+             aspects into the one dimension aspect in line with changes
+             to the dimensional aspect model.
+           </p>
+         </revision>        
+ 
+         <revision ref="person-geoff" day="17" month="11" year="2008">
+           <p>
+             Made the <att>variable</att> attribute have type <code>variable:QName</code>
+             because it contains variable name QNames that do not resolve according to the
+             rules used for QNames with data type xs:QName. This change was suggested by 
+             <personref ref="person-herm"/>.
+           </p>
+         </revision>
+ 
+         <revision ref="person-geoff" day="15" month="12" year="2008">
+           <p>
+             Fixed hyperlink formatting problems.
+           </p>
+         </revision>
+ 
        </revisions>
  
      </section>
