>Actually it doesn't permit '?'.

If easy to add, would be good.

>Why do you want to make the life more difficult than it is with >1 line?

I'm not saying it *has* to be on >1 line, but it should allow for flexibility, e.g.:
"Params":[
"querya.ecl:param1=value1",param2=value3",
..
"query?.ecl:paramX=valuex"
"querya.ecl:other=value1"
]