An rsds file extension is related to the SharePoint and SQL Server programs. An rsds file contains data source.
Software that open rsds file
RSDS file extension - SharePoint shared data source
What is rsds file? How to open rsds files?
File type specification:
The rsds file extension is related to Microsoft SharePoint and used for its shared data source format. Used by the reporting service in Microsoft SharePoint.
The RSDR file format is also used by Microsoft SQL Server reporting services.
The default software associated to open rsds file:
Company or developer:
Microsoft Corporation
Microsoft SharePoint Server is server side application for SharePoint services. SharePoint Server is an integrated suite of server capabilities that can help improve organizational effectiveness by providing comprehensive content management and enterprise search, accelerating shared business processes, and facilitating information-sharing across boundaries for better business insight.
Microsoft SharePoint Workspace 
Company or developer:
Microsoft Corporation
Microsoft SharePoint Workspace is successor of Microsoft Office Groove. SharePoint Workspace is collaboration software that is able to anytime, anywhere access to Microsoft SharePoint team sites. Seems like it was replaced by SharePoint 2013.
List of software applications associated to the .rsds file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open rsds file, edit rsds file, convert rsds file, view rsds file, play rsds file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting rsds files.
Software that import rsds file - SharePoint shared data source
Programs supporting the exension rsds on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for import rsds file action.
Microsoft Windows:
Main software associated with rsds file by default:
Microsoft SharePoint Server
Microsoft SharePoint Workspace
Other suggested software:
Microsoft SQL Server Reporting Services
