rds rdl rsd in SSRS

Question

I came across three different extensions while trying to create SSRS Reports.

1> .rds

2> .rsd

3> .rdl

Answer 1

Report Definition share data source. (rds)

Report Definition Language (rdl)

A shared dataset is published on the report server and can be used by multiple reports. A shared dataset must be based on a shared data source. It can be cached and scheduled creating a cache refresh plan.

Shared datasets provides queries which can be used by more than one report.