The results element contains the complete sequence of query results.
For each Query Solution in the query results, a result child-element of
results is added giving a document like:
<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#"
xmlns:its="http://www.w3.org/2005/11/its"
its:version="2.0">
... head ...
<results>
<result>...
</result>
<result>...
</result>
...
</results>
</sparql>
Each result element corresponds to one Query Solution in a result and contains child elements (in no particular order) for each Query Variable that appears in the
solution. It is used to record how the query variables bind to RDF Terms.
Each binding inside a solution is written as an element binding as a child of result with the query variable name as the value of the name attribute. So
for a result binding two variables x and hpage it would look like:
<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#"
xmlns:its="http://www.w3.org/2005/11/its"
its:version="2.0">
<head>
<variable name="x"/>
<variable name="hpage"/>
</head>
<results>
<result>
<binding name="x"> ... </binding>
<binding name="hpage"> ... </binding>
</result>
<result>
<binding name="x"> ... </binding>
<binding name="hpage"> ... </binding>
</result>
...
</results>
</sparql>
The value of a query variable binding, which is an RDF Term, is included as the content of the binding as follows:
- RDF URI Reference U
<binding><uri>U</uri></binding>- RDF Literal S
<binding><literal>S</literal></binding>- RDF Literal S with language L without base direction
<binding><literal xml:lang="L">S</literal></binding>- RDF Literal S with language L with base direction L
<binding><literal xml:lang="L" its:dir="B">S</literal></binding>- RDF Typed Literal S with datatype URI D
<binding><literal datatype="D">S</literal></binding>- Blank Node label I
<binding><bnode>I</bnode></binding>- Triple Term, with subject S, predicate P, object O
<binding>
<triple>
<subject>S</subject>
<predicate>P</predicate>
<object>O</object>
</triple>
</binding>
If, for a particular solution, a variable is unbound, no binding element for that variable is included in the result element.
S, P, and O in Triple Terms are encoded recursively, using the same format, without the enclosing <binding> tag
Note: The blank node label I is scoped to the result set XML document and need not have any association to the blank node label for that RDF Term in the query
graph.
An example of a query solution encoded in this format is as follows:
<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#"
xmlns:its="http://www.w3.org/2005/11/its"
its:version="2.0">
<head>
<variable name="x"/>
<variable name="hpage"/>
<variable name="name"/>
<variable name="age"/>
<variable name="mbox"/>
<variable name="friend"/>
</head>
<results>
<result>
<binding name="x">
<bnode>r2</bnode>
</binding>
<binding name="hpage">
<uri>http://work.example.org/bob/</uri>
</binding>
<binding name="name">
<literal xml:lang="en">Bob</literal>
</binding>
<binding name="age">
<literal datatype="http://www.w3.org/2001/XMLSchema#integer">30</literal>
</binding>
<binding name="mbox">
<uri>mailto:bob@work.example.org</uri>
</binding>
...
</results>
</sparql>
An example of a query solution that includes triple terms is as follows:
<?xml version="1.0"?>
<sparql xmlns="http://www.w3.org/2005/sparql-results#"
xmlns:its="http://www.w3.org/2005/11/its"
its:version="2.0">
<head>
<variable name="x"/>
<variable name="name"/>
<variable name="triple"/>
</head>
<results>
<result>
<binding name="x">
<bnode>r2</bnode>
</binding>
<binding name="name">
<literal xml:lang="en">Bob</literal>
</binding>
<binding name="triple">
<triple>
<subject>
<uri>http://example.org/alice</uri>
</subject>
<predicate>
<uri>http://example.org/name</uri>
</predicate>
<object>
<literal datatype="http://www.w3.org/2001/XMLSchema#string">Alice</literal>
</object>
</triple>
</binding>
</result>
...
</results>
</sparql>