It's all about the Software

From an official "allocation" point of view, these are the most authoritative listings and have two useful features.

• They are seasonal (issued twice a year as Ayy and Byy).

• They include effective start and end dates.

Could Simon please include the start/end as new columns in the SDRC Frequency Database?

And could the season code be appended to the database "Source" column value?
That way, we could distinguish the source amongst multiple downloaded schedule seasons.