Research Article
A Semantic Approach to Dynamic Path Planning for Fire Evacuation through BIM and IoT Data Integration
Table 4
Ontology information retrieval rules.
| | No. | Query | Aim |
| | Q1 | SELECT (COUNT(?space) as ?count) WHERE {
?space rdf:type fe:Space .
} | Retrieving the number of space instances in the knowledge graph |
| | Q2 | SELECT ?space ?device WHERE {
?space rdf:type fe:Room .
?device rdf:type fe:Sensor .
?device fe:isLocatedIn ?space
} | Retrieving the locations of device instances |
| | Q3 | SELECT ?storey ?space WHERE {
?storey rdf:type fe:BuildingStorey .
?space rdf:type fe:Space .
?storey fe:hasSpace ?space
} | Retrieve the space groups located in a storey |
| | Q4 | SELECT ?space_1 ?space_2 ?data WHERE {
?space_1 rdf:type fe:Room .
?space_2 rdf:type fe:Room .
?distance rdf:type fe:Distance .
?distance fe:from ?space_1 .
?distance fe:to ?space_2 .
?distance fe:hasDistance ?data
} | Retrieving the connectivity relationships between space instances |
| | Q5 | SELECT ?space_1 ?space_2 ?data WHERE {
?space_1 rdf:type fe:Room .
?space_2 rdf:type fe:Room .
?distance rdf:type fe:Distance .
?distance fe:from ?space_1 .
?distance fe:to ?space_2 .
?distance fe:hasDistance ?data
} | Retrieving the evacuation distances between space instances |
| | Q6 | SELECT ?space ?data WHERE {
?space rdf:type fe:Room .
?space fe:hasPeopleValue ?data
} | Retrieving the number of unevacuated people in space instances |
| | Q7 | SELECT ?device ?data ?time WHERE {
?device rdf:type fe:Sensor .
?device fe:hasObservation ?obs .
?obs fe:hasResult ?data .
?obs fe:resultTime ?time
} | Retrieving the observation values and observation times of device instances |
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