I'm trying to list data gruoping them by a column of the rows. My list shoulb be some like that:

Value of column common : X
Row 1
Row 2
.....

Value of column common : Y
Row 3
Row 4
......

Value of column common : Z
Row 5
Row 6
...

My problem is the how to say to list grouping by this column. It's possible with preceeding-sibling?

Thanks.

See http://www.jenitennison.com/xslt/grouping for all you ever wanted to know about grouping in XSLT 1.0

In XSLT 2.0, use <xsl:for-each-group>

Michael Kay
http://www.saxonica.com/
Author, XSLT Programmer's Reference and XPath 2.0 Programmer's Reference