Star this Gist to indicate preference for the flatter form (no "when", no "type", no new GeoJSON items, JSON-LD required) of GeoJSON-LD time (see geojson/geojson-ld#13).
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August 29, 2015 14:00
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As in the examples of time.md but flatter. Items of the "when" object go up to the feature object and the "types" are eliminated: instead the presence of a "datetime" signals to non-LD JSON processors that we are talking about an datetime and presence of "start" and/or "stop" signals that we are talking about an interval. Duck-typing, if you will. For JSON-LD processors, the type of thing can be made more explicit by specifying its "@type" (see http://www.w3.org/TR/json-ld/#specifying-the-type).
The examples below are for the proposal made by @sgillies in geojson/geojson-ld#13.
Copy any of the JSON text blocks to http://json-ld.org/playground/ to see how it parses.
For a thing that exists at a certain time.
{
"@context": {
"Feature": "http://example.com/vocab#Feature",
"Instant": "http://www.w3.org/2006/time#Instant",
"Interval": "http://www.w3.org/2006/time#Interval",
"Point": "http://example.com/vocab#Point",
"coordinates": "http://example.com/vocab#coordinates",
"geometry": "http://example.com/vocab#geometry",
"id": "http://example.com/vocab#id",
"datetime": {
"@id": "http://www.w3.org/2006/time#inXSDDateTime",
"@type": "http://www.w3.org/2001/XMLSchema#dateTime"
},
"properties": "http://example.com/vocab#properties",
"start": {
"@id": "http://www.w3.org/2006/time#hasBeginning",
"@type": "http://www.w3.org/2001/XMLSchema#dateTime"
},
"stop": {
"@id": "http://www.w3.org/2006/time#hasEnding",
"@type": "http://www.w3.org/2001/XMLSchema#dateTime"
},
"type": "http://example.com/vocab#type"
},
"@type": ["Feature", "Instant"],
"geometry": {
"type": "Point",
"coordinates": [
0.0,
0.0
]
},
"datetime": "2014-04-24",
"type": "Feature",
"properties": {}
}
For a thing that exists during a certain interval.
{
"@context": {
"Feature": "http://example.com/vocab#Feature",
"Instant": "http://www.w3.org/2006/time#Instant",
"Interval": "http://www.w3.org/2006/time#Interval",
"Point": "http://example.com/vocab#Point",
"coordinates": "http://example.com/vocab#coordinates",
"geometry": "http://example.com/vocab#geometry",
"id": "http://example.com/vocab#id",
"datetime": {
"@id": "http://www.w3.org/2006/time#inXSDDateTime",
"@type": "http://www.w3.org/2001/XMLSchema#dateTime"
},
"properties": "http://example.com/vocab#properties",
"start": {
"@id": "http://www.w3.org/2006/time#hasBeginning",
"@type": "http://www.w3.org/2001/XMLSchema#dateTime"
},
"stop": {
"@id": "http://www.w3.org/2006/time#hasEnding",
"@type": "http://www.w3.org/2001/XMLSchema#dateTime"
},
"type": "http://example.com/vocab#type"
},
"@type": ["Feature", "Interval"],
"geometry": {
"type": "Point",
"coordinates": [
0.0,
0.0
]
},
"stop": "2014-04-25",
"start": "2014-04-24",
"type": "Feature",
"properties": {}
}
For a thing that exists since a certain time.
{
"@context": {
"Feature": "http://example.com/vocab#Feature",
"Instant": "http://www.w3.org/2006/time#Instant",
"Interval": "http://www.w3.org/2006/time#Interval",
"Point": "http://example.com/vocab#Point",
"coordinates": "http://example.com/vocab#coordinates",
"geometry": "http://example.com/vocab#geometry",
"id": "http://example.com/vocab#id",
"datetime": {
"@id": "http://www.w3.org/2006/time#inXSDDateTime",
"@type": "http://www.w3.org/2001/XMLSchema#dateTime"
},
"properties": "http://example.com/vocab#properties",
"start": {
"@id": "http://www.w3.org/2006/time#hasBeginning",
"@type": "http://www.w3.org/2001/XMLSchema#dateTime"
},
"stop": {
"@id": "http://www.w3.org/2006/time#hasEnding",
"@type": "http://www.w3.org/2001/XMLSchema#dateTime"
},
"type": "http://example.com/vocab#type"
},
"@type": ["Feature", "Interval"],
"geometry": {
"type": "Point",
"coordinates": [
0.0,
0.0
]
},
"start": "2014-04-24",
"type": "Feature",
"properties": {}
}
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