Yes, the article was a little light on detail, but my recent reading of forums (not this one, I'm a newcomer here) suggests that there is no lower limit to the level of detail you should supply.
The other day, I was preparing CSV files for insertion into a MySQL database. They contain numerical information and I opened one in Excel just to have a look at the data (while making a mental note not to save it because Excel would change date formats and numerical precision.
Excel said 'whoa, this is a SYLK file, are you sure you want to open it?'
I'd never heard of SYLK files. What does it mean?
en.wikipedia.org/wiki/SYmbolic_LinK
...
Of course it was just another example of MS attempting to claim ownership of every aspect of computer software, and I could ignore it, but why did no-one ever tell me about them?