Thank you for the quick replies!
Thinking about it, this is totally obvious. It does not matter what the
property is that is followed zero times to end up at the start.
On 26.09.19 10:39, Lorenz Buehmann wrote:
ah and forgot, the formal translation and evaluation is described here:
https://www.w3.org/TR/sparql11-query/#PropertyPathPatterns
On 26.09.19 10:35, Andy Seaborne wrote:
And the "+" operation is "one or more" which would require :prop to be
present.
On 9/26/19 9:32 AM, Lorenz Buehmann wrote:
* means zero or more
if you do zero steps from your start node :foo to reach a node ?x, this
?x is trivially the start node itself
On 26.09.19 10:18, Andreas Textor wrote:
Hi all,
I've found a behaviour with a SPARQL path expression that I find
confusing.
Given a graph that contains just the one triple ":foo :prop :bar" (for
any prefix :), I execute the following select query:
select * where { :foo :prop* ?x . }
and get both :foo and :bar as results for ?x, even though there is no
statement :foo :prop :foo. I can even use any other property name/URI
in the path expression and still get :foo as a result.
I found no hint on the expected behaviour of this case in the SPARQL
spec, but this seems not right. Can you please give any hints?
