Hi @anjana1 ,
Tag names must not have any dots in them because the way they are stored in Elasticsearch (ES), where dots are used to indicate properties & sub-properties into JSON documents. Having dots there would introduce ambiguity thus we have to normalize them without dots for proper indexing.
Thus the short answer is that it's not possible to have tags with dots in their name. How does it impacts your use-case ? Is that just an inconvenience or are there impactful consequences here ?