CODEWITHSUNDEEP
xsltxpath
Richard Corfield
Richard Corfield

Reputation: 2529

XPath selecting multiple elements with predicates

I have an XPath query which is doing what I want, namely selecting a union of 'surname' & 'given-names' with the given predicates (It's actually either/or that I need, but the union works fine):

/header/authors/surname[./text() and @id='1']
|
/header/authors/given-names[./text() and @id='1']

However this seems overly long-winded to me and I feel that it should be possible to do something more succinct such as:

/header/authors/(surname|given-names)[./text() and @id='1']

... but this version is not valid XPath.

Can anyone tell me of a neater way of writing the original XPath expression which doesn't require the full path to be written twice?

Thanks

Richard

Upvotes: 11

Views: 17300

Answers (3)

LarsH
LarsH

Reputation: 28004

In addition to Alejandro's and Seva's good answers, another alternative is

(/header/authors/surname | /header/authors/given-names)[text() and @id='1']

This is valid in XPath 1.0. It still is a bit redundant, but is more succinct than the long-winded version in your question.

A further alternative would be to declare a variable for surname elements and a variable for given-name elements, and then

($surnames | $given-names)[text() and @id='1']

That would probably be longer in total, but easier to read than the above.

Upvotes: 3

user357812
user357812

Reputation:

First, this is valid XPath 2.0:

/header/authors/(surname|given-names)[./text() and @id='1']

Second, this XPath 1.0:

/header/authors/*[self::surname|self::given-names][text()][@id='1']

Upvotes: 27

Seva Alekseyev
Seva Alekseyev

Reputation: 61398

How about

/header/authors/*[(name() = "surname" or name()="given-names") and ./text() and @id='1']

Upvotes: 4

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