Parse supplements

[mico]

ITU-T A Suppl 2 ITU-T A Suppl. 2

[mico]

It seems that the supplements for ITU have a different approach than what we are used to. For example, for H series every supplement covers different topics and every supplement updating over the time (have editions over the years). They are not related only to individual identifiers.

https://www.itu.int/ITU-T/recommendations/index.aspx?ser=H

But also have individual supplements:

• ITU-T A Suppl. 2 (12/2022) - https://www.itu.int/ITU-T/recommendations/rec.aspx?rec=15252&lang=en
• ITU-T E.156 Suppl. 2 - https://www.itu.int/rec/dologin_pub.asp?lang=f&id=T-REC-E.156-201106-I!Sup2!PDF-E&type=items
• ITU-T H Suppl. 2 - https://www.itu.int/rec/dologin_pub.asp?lang=f&id=T-REC-H.Sup2-201112-S!!PDF-E&type=items
• ITU-T L Suppl. 2 (12/2013) - https://www.itu.int/ITU-T/recommendations/rec.aspx?id=12140&lang=en