For CSV(Comma-separated values) the file extension is .csv and the Internet media type is text/csv .
For TSV(Tab-separated values) the file extension is .tsv/.tab and the Internet media type is text/tab-separated-values .
The 2 above statements are well known due to some existing standards. My question is - for a delimited text file which uses as delimiter the colon(:) which should be the file extension and the Internet media type? Is there a known way for deciding the correct file extension and the Internet media type for a text format which doesn't have a defined standard? I searched for this, but I couldn't find anything useful.