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../lxml:column\[@name='COLUMNAME'\]
This is not necessary for referencing the current column (i.e. the column containing the weblet). In this case you can use a single period (.). If you know the position of the column you want to reference, you can use an Xpath expression like this:
../lxml:column\[2\]
This is handy for large lists as it is much faster but it may cause problems if you change the order of the columns in your list.
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The XPath expression tells the XSLT processor where to find the column in the XML data output by the Webroutine. Like DOS or Linux file paths, the expression indicates a path to the target data from the current position and, like file paths, a period (.) refers to the current position and two periods (..) refer to the parent.
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