%META:TOPICPARENT{name="VirtTipsAndTricksSPARQL11FeaturesExamplesCollection"}%

---+Virtuoso SPARQL 1.1. BIND Usage Examples 


---++What?
This guide contains Virtuoso SPARQL 1.1. BIND Usage example queries which you can run against 
any SPARQL endpoint that supports SPARQL 1.1 and the ability to allow a verified user perform 
INSERT operations. 

---++Why?
To make a SPARQL query more flexible by assigning value(s) to variable(s) and having options for more precised filtering the query results by these variables.

---++How?

   1 Assume the following Raw Data Representation in Turtle:
<verbatim>   
@prefix:    <http://example.org/book/> .
@prefix ns:   <http://example.org/ns#> .

:book1  <http://purl.org/dc/elements/1.1/title>     "SPARQL Tutorial" .
:book1  ns:price     42 .
:book1  ns:discount  0.2 .

:book2  <http://purl.org/dc/elements/1.1/title>     "The Semantic Web" .
:book2  ns:price     23 .
:book2  ns:discount  0.25 .
</verbatim> 
   1 Load the sample data: 
<verbatim> 
PREFIX :     <http://example.org/book/> 
PREFIX ns:   <http://example.org/ns#> 

INSERT 
  { 
    GRAPH <urn:sparql:bind:tests> 
      {
        :book1  <http://purl.org/dc/elements/1.1/title> "SPARQL Tutorial" . 
        :book1  ns:price                                42 . 
        :book1  ns:discount                             0.2 . 
        :book2  <http://purl.org/dc/elements/1.1/title> "The Semantic Web" . 
        :book2  ns:price                                23 . 
        :book2  ns:discount                             0.25 . 
      }
  }
</verbatim> 
   1 Assume the following SPARQL query using <code>BIND</code>:
<verbatim>
PREFIX  ns:  <http://example.org/ns#>

SELECT  ?title ?price
FROM <urn:sparql:bind:tests>
  {
    ?x ns:price ?p .
    ?x ns:discount ?discount .
    ?x <http://purl.org/dc/elements/1.1/title> ?title . 
    BIND (?p*(1-?discount) AS ?price)
    FILTER( ?price < 20 )
  }
</verbatim> 
   1 [[http://bit.ly/18Whdgh][View the SPARQL Query Definition via SPARQL Protocol URL]]
   1 [[http://bit.ly/18WhbVR][View the SPARQL Query Results via SPARQL Protocol URL]] 





---++Related

   * [[VirtTipsAndTricksGuide][Virtuoso Tips and Tricks Collection]]
   * [[VirtTipsAndTricksSPARQL11FeaturesExamplesCollection][Virtuoso SPARQL 1.1 Usage Examples Collection]]
   * [[http://virtuoso.openlinksw.com/tutorials/sparql/SPARQL_Tutorials_Part_9/SPARQL_Tutorials_Part_9.html][Virtuoso SPARQL 1.1 Syntax Tutorial]]
   * [[http://bit.ly/WHtTAG][Virtuoso SPARQL 1.1. BIND Tutorial]]
   * [[http://docs.openlinksw.com/virtuoso/rdfsparql.html][Virtuoso Documentation]]