Sub Heading under Subject

[amcgAnneMcGrath]

A public sector body has requested the addition of a sub-heading feature under the Subject heading in pxStat.
Currently, the dataset theme is "Other Public Sector Bodies," with "Health Research Board" as the subject. The request is to include an additional sub-heading option under "Health Research Board," such as "In-patient Psychiatric Units and Hospitals."
This addition is necessary as another division within HRB intends to upload their data on pxStat, unrelated to the current dataset, and they will also require a sub-heading for organization purposes.
Is this a possibility with the next release of pxStat ?