XPATH - Select all child nodes with a specific attribute

Question

What would be the xpath query to find all child nodes with a specific attribute value, but starting from a node with a specific attribute value?

This is kind of rela

Answer 1

HI Chris sorry but that isnt quite working for me. If you run my following code:

    $dom = new DomDocument;
$dom->load('http://rdfs.org/sioc/ns#');
$xpath = new DOMXPath($dom);

$elements = array();
foreach($xpath->query('//@rdf:about') as $element) {

    array_push($elements, $element->value);
}

foreach($elements as $element) {

    echo("<br />" . $element);
}

You should get a list of elements in the sioc ontology. The problem is that the first 9 are not actually part of the ontology and so I want to ignore them and start on the 10th node which has 'http://rdfs.org/sioc/ns#' as its value for the rdf:about attribute.

By including your xpath query i get nothing back at all.

Answer 2

$xpath->query("//*[@rdf:about='http://rdfs.org/sioc/ns#']/following-sibling::*/@rdf:about");

With your sample script, outputs URLs starting/ending with:

http://rdfs.org/sioc/ns#Community
http://rdfs.org/sioc/ns#Container
...
http://rdfs.org/sioc/ns#reference
http://rdfs.org/sioc/ns#subject