Powerful patterns with XSLT 3.0 hidden improvements
summary
XSLT 3.0 extends pattern matching with predicate patterns that start with . and can match atomic items like maps (example: .(key(42))), processors evaluate patterns right to left for speed and now ignore runtime errors inside patterns, avoiding crashes on missing keys. Patterns accept descendant/self/namespace axes and top‑level operators like except and intersect, allow variable references and parentheses for subexpressions, and apply‑templates can take any sequence. Beware disjunctive patterns that force full‑tree searches and hurt performance.
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chapters (10)
- 0:00Introduction to patterns
- 3:06Defining XSLT patterns
- 5:19New features in XSLT 3.0
- 7:01Expanded pattern syntax
- 9:13Practical implementation
- 12:28Pattern node nuances
- 16:57Common pattern pitfalls
- 20:07Advanced pattern techniques
- 22:17The power of parentheses
- 26:21Advanced use cases and Q&A
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