Complex xPath query

Question

I need to write a quite complex XSLT 1.0 query. Given the following XML file, I need a query to get the set of authors who are in multiple reports. (for example Antonio Rossi, because he's both on report 1 and 2). ``` I venti del Nord Antonio Rossi Mario Verdi 13-08-1980 Mario Verdi versione iniziale 14-08-1981 Antonio Rossi poche modifiche Le pioggie del Nord Antonio Rossi Luca Bianchi 13-12-1991 Antonio Rossi versione iniziale 14-08-1992

Accepted Answer

This works even in XPath 1.0:

```
//report//autore[text()=../../following-sibling::report//autore/text()]
```

It selects all `autore` nodes that have text content equal to any `autore` node in any of the following `report` nodes, too.

Or, to keep it short, even this should work if there's nothing really tricky in your real xml file:

```
//autore[text()=../../following-sibling::*//autore/text()]
```

EDIT: Working by accident. Please see the comments below.

Complex xPath query

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