In Trac, at initial search setup it is possible to specify original tweets, retweets and quote tweets as separate elements for inclusion in the search. Once data is collected, at the filter level, only 2 subtypes are available, Posts and Engagements, and quote tweets are represented as Engagements, such that they cannot be included in a filter without also including all retweets. The client is interested in quote tweets, but not retweets.
Client would like to be able to do this via Pulsar API. It appears that the "subtype" value is available as output metadata on the Trac API, but is not available as a Trac API filtering parameter.