RE: Common Element Solution (XSL 2.0)

    > That last line has me puzzled Mike. Would someone expand 
    please, for 
    > the uninitiated?
    
    In the input we have a set of tables each containing zero 
    or more columns, each column has a name. We want to find 
    the names of the columns that appear in each table. Group 
    the columns by name; for each group (of columns with the 
    same name), the column appears in every table if the number 
    of tables containing a column in that group equals the 
    total number of tables.
    
    Any clearer?

 <tables>
   <table name="table1">
     <column name="col1"/>
     <column name="col2"/>
     <column name="col3"/>
     <column name="col4"/>
   </table>
   <table name="table2">
     <column name="col1"/>
     <column name="col2"/>
     <column name="col5"/>
     <column name="col6"/>
   </table>

Yes, the basics are clear. Your last line(s) were
  you want something like

   count(current-group()/parent::table) = $number-of-tables

  relying on the fact that "/" eliminates duplicates.


My question was, how does the '/' eliminate duplicates?
That's the bit I don't understand. 

regards DaveP






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