Re: Closest ancestor with one of set of names
Hi Paul, > I have a node stored in a variable, and a list of element names. > The stored node is not the context node > > I need to find the node that meets these criteria: > 1) name is in the list > 2) is an ancestor of the stored node. > 3) is the closest (most direct) ancestor of the stored node, from > all ancestor nodes whose names (element names) are in the list, You can find all ancestor elements of the node $NODE with: $NODE/ancestor::* When you use a variable reference at the beginning of a path then the node(s) in that variable form the starting point for the path. Assuming that the element names are given as the values of nodes in a node set, held in the $NAMES variable, then you can find those ancestor elements that have a name from that list with: $NODE/ancestor::*[local-name() = $NAMES] This works because if you compare a string (the local name) to a node set, then the comparison is true if of the nodes have a value equal to the string. And you can find the closest one by looking at the first of those (the ancestor:: axis is a reverse axis, so the first is the nearest ancestor): $NODE/ancestor::*[local-name() = $NAMES] If the element names (e.g. FRONT and OPEN) are known to you, such that they can be hardcoded in the stylesheet, then you could use something like: $NODE/ancestor::*[self::FRONT or self::OPEN] This deals better with namespace issues than testing the local-name() would. If the element names are in a string (e.g. 'FRONT,OPEN') then you can use contains() instead: $NODE/ancestor::*[contains(concat(',', $NAMES, ','), concat(',', local-name(), ','))] I hope that helps, Jeni --- Jeni Tennison http://www.jenitennison.com/ XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
PURCHASE STYLUS STUDIO ONLINE TODAY!
Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!
Download The World's Best XML IDE!
Accelerate XML development with our award-winning XML IDE - Download a free trial today!
Subscribe in XML format