OPAL Metadata Verbs

Verb

Description

add_key

Add a candidate key to the output. The candidate key…

colenum

Mark columns as enumerations, or not, by name….

colimmutable

Mark resource columns as time immutable a.k.a….

colshow

Show or hide columns by name. Arguments are colname:…

droptime

Clear the valid from (and the valid to), turning…

interface

Map fields of this dataset to a pre-defined interface.

make_event

Given a resource, make_event will demote it to a…

make_resource

Convert an event table to a resource with the…

make_session

Group events or intervals that are close to each…

merge_events

Merge consecutive events into new events based on…

set_label

Declare the ‘label’ of the output to be the designat…

set_link

Add a foreign key to the output. The foreign key…

set_metric

Register a metric, with its metadata defined in an…

set_primary_key

Declare the primary key of the output as consisting…

set_valid_from

Declare the valid from of the output to be the…

set_valid_to

Declare the ‘valid to’ of the output to be the named…

unset_keys

Remove the primary and candidate key declarations…

unset_link

Drop a foreign key by specifying the foreign keys…