Delete Fields¶
Description¶
You can delete one or more infoton fields by applying the special #markReplace indicator to them, using the _in endpoint.
You specify the field to delete using this triple format:
<infotonURI> <cmwell://meta/sys#markReplace> <fieldID>
You can also use the wildcard <*> instead of a field ID, as follows:
<infotonURI> <cmwell://meta/sys#markReplace> <*>
This will delete all the infoton's fields that belong to the default graph. Fields added with a specific sub-graph label will not be deleted by this command.
You can also delete fields with specific sub-graph labels by supplying the label as the 4th value in a quad, as follows:
<infotonURI> <cmwell://meta/sys#markReplace> <fieldID> <graphLabel>
And you can delete all fields by supplying the <*> wildcard as the 4th value in the quad, as follows:
<infotonURI> <cmwell://meta/sys#markReplace> <fieldID> <*>
Syntax¶
URL: <CMWellHost>/_in
REST verb: POST
Mandatory parameters: N/A
Template:
curl -X POST <cm-well-host>/_in?format=<format> <triples or quads to delete>
URL example: N/A
Curl example (REST API):
Triples:
curl -X POST "<cm-well-host>/_in?format=ttl " -H "Content-Type: text/plain" --data-binary '<http://data.com/1-12345678>
<cmwell://meta/sys#markReplace> <http://ont.com/bermuda/hasName> .'
Quads:
curl -X POST "<cm-well-host>/_in?format=nquads" -H "Content-Type: text/plain" --data-binary '<http://data.com/1-12345678>
<cmwell://meta/sys#markReplace> <http://ont.com/bermuda/hasName> <http://mySubGraph>.'
All quad values with sub-graph labels:
curl -X POST "<cm-well-host>/_in?format=nquads" -H "Content-Type: text/plain" --data-binary '<http://data.com/1-12345678>
<cmwell://meta/sys#markReplace> <http://ont.com/bermuda/hasName> <*>.'
Special Parameters¶
| Parameter | Description | Values | Example |
|---|---|---|---|
| priority | If this flag appears in an update call, that call receives priority relative to non-priority calls. To use this flag, you must also pass the X-CM-WELL-TOKEN request header, with a token that grants access to the priority feature. This feature should be used with discretion so as not to flood the priority queue. | None |
Code Example¶
Call¶
curl -X POST "<cm-well-host>/_in?format=ttl " -H "Content-Type: text/plain" --data-binary '<http://data.com/1-12345678>
<cmwell://meta/sys#markReplace> <http://ont.com/bermuda/hasName> .'
Results¶
{"success":true}
Note
- You can also use the #markReplace operator to replace existing field values rather than delete them. See Replace Field Values.
- The operation described above deletes all values of a field. If you want to delete only a subset of multiple field values, see Delete Specific Field Values.
- The replace-mode flag and the #markReplace indicator should not be used in the same command. If they are, replace-mode overrides #markReplace.