categorical-constant

The categorical-constant parser does not load any data from a source data table. On the other hand, it will assign every entity identified by its associated table object into a single categorical variable within a collection.

{
  "parser_type": "categorical-constant",
  "table_alias": "tata",
  "column": "ccc1",
  "value": "Yes",
  "collection": "collection_name",
  "variable": "variable_name"
}

At first, it may seem useless to assign every entity into the same categorical variable. But it's not every entity - because this parser operates in conjunction with a table object, it's possible that the source data table contains rows that only match with a subset of entities loaded from the entity_table.

Thus, this parser is able to flag all entities that were present in an other_table.

value

usage: required
The value attribute becomes the variable name.