| By Dimitre Novatchev |
| Language | XSLT |
| Category | xml, designpatterns |
| Posted | 29 Jan 2001 |
| Updated | 04 Feb 2001 |
| Summary |
| This snippet describes how to use the "Kaysian method" to express the intersection of two node-sets in pure XPath. |
| The only set operation provided in XSLT is the Union -- and it can be specified using the XPath and XSLT union operator "|". |
| Until recently it was believed that in order to implement other types of set operations (e.g. intersection) one could only resort on using extension functions -- and different XSLT processors provided such extensions (e.g. saxon:intersection). |
| As it turned out in June 2000, it is possible to express the intersection of two node-sets in pure XPath. This technique was discovered by Michael Kay and is known as the Kaysian method. |
| XSL Code: |
| XML Code: |