ARLAS Tagging API

This API is available for tagging hits in ARLAS collections.

By tagging, we mean here adding a value to a field that is of type Array.

The field to tag must be declared in the ARLAS collection.

There are two ways to select hits to be tagged:

  • if no propagation parameter is specified, the value is added to the field of all the hits of a collection matching the Search part of the TagRequest. If no Search is provided, then the whole collection is tagged.
  • if a propagation parameter is specified, then a first selection is made from the Search part in order to list all the unique propagation.field values. All hits of the collection matching each unique propagation.field value (optionally limited by the propagation.filter parameter) are then tagged with the tag field.

The collection name, the path to the field carrying the tag and the tag values must be provided in order to tag a collection. If needed a Search can be provided to specify the hits to be tagged:

curl -X POST  \
    --header 'Accept: application/json;charset=utf-8' \
    -d '{ "search": {}, "tag": { "path": "plant.color","value": "pink"}, "propagation": { "field": "id", "filter": {} }, "label": "pinktag" }' \
    'http://<arlas-tagger-host>:<arlas-tagger-port>/arlas/write/geodata/tag?pretty=false'

In order to remove a tag, meaning a value from the field, the same tag request is sent, but on the untag endpoint:

curl -X POST  \
    --header 'Accept: application/json;charset=utf-8' \
    -d '{ "search": {}, "tag": { "path": "plant.color","value": "pink"}}' \
    'http://<arlas-tagger-host>:<arlas-tagger-port>/arlas/write/geodata/untag?pretty=false'

To remove all the tags for a given field, simply omit the value of the tag:

curl -X POST  \
    --header 'Accept: application/json;charset=utf-8' \
    -d '{ "search": {}, "tag": { "path": "plant.color"}}' \
    'http://<arlas-tagger-host>:<arlas-tagger-port>/arlas/write/geodata/untag?pretty=false'

Tagging is done asynchronously, through Kafka logs. The response from the first (un)tag request gives an id that can be used to request the status of the tagging process itself.

curl -X GET  \
    --header 'Accept: application/json;charset=utf-8' \
    'http://<arlas-tagger-host>:<arlas-tagger-port>/arlas/status/geodata/tag?id=...'

Tagging can be replayed. The Kafka reference log is read again from the given offset and all tagging requests are executed again in the same order than initially received.

curl -X GET  \
    --header 'Accept: application/json;charset=utf-8' \
    'http://<arlas-tagger-host>:<arlas-tagger-port>/arlas/write/geodata/tagreplay?offset=...'

Warning

Only taggable fields can be tagged. In order to be taggable, a field must have its path provided in the CollectionReference, more specifically in params.taggable_fields.