Dynamic Field Naming Conventions and Definitions

ts: text single
tm: text multiple
tus: text unstemmed single
tum: text unstemmed multiple
tos: text oomit norms single
tom: text oomit norms multiple
tc...s: text custom ... single
tc...m: text custom ... multiple
tuc...s: text unstemmed custom ... single
tuc...m: text unstemmed custom ... multiple

For edge ngram there's no unstemmed variation, but the field exists for compatibility.
Custom types are those which are are variations of the default text field Search API provides. You can add new fields or modify existing ones using all configuration options Solr provides. The edge ngram filter is such an option.

Perfect. Thank you!