OntoTrader: An Ontological Web Trading Agent Approach for Environmental Information Retrieval

Algorithm 1

(01) (QUERY-REF

(02)   :sender (agent-identifier:name WIAgent@SOLERES-KRS

(03)   :addresses (sequence http://...))

(04)   :receiver (set (agent-identifier

(05)   :name  IMIAgent@SOLERES-KRS ))

(06)   :content “PREFIX eid: http://acg.ual.es/soleres/tests/EIDOntology.owl#

(07)   PREFIX rdf: http://www.w3.org/1999/02/22-rdf-syntax-ns#

(08)   SELSCT DISTINCT ?EID__VariableName

(09)   WHERE  {

(10)  ?EID__EID  eid:EID_eimId ?EID__EID_eimID.

(11)   ?EID__EID  eid:EID_hasClassification ?EID__Classification.

(12)  ?EID__Classification eid:Classification_hasLayer ?EID__Layer.

(13)  ?EID__Layer  eid:Layer_hasVariable ?EID__Variable.

(14)  ?EID__Variable eid:Variable_name ?EID__VariableName.

(15)  ?EID__Classification eid:Classification_hasTime ?EID__Time.

(16)  ?EID__Time  eid:Time_YEAR ?EID__TIMEYEAR.

(17)  FILTER (?EID__TimeYear = 2008).

(18)     }

(19)    ORDER BY ASC(?EID__VariableName)

(20)   :language SPARQL)