Kinds of RQ Files

Chief RQ Description

.RQ

Extension:	.rq
Classification:	SPARQL Query

The RQ file represents a query created by SPARQL, a Resource Description Framework (RDF) query language for databases that has the ability to manipulate and retrieve data saved in RDF format.

Company:	Open Source
Division:	Data Files
Key:	HKEY_CLASSES_ROOT\.rq

Software Programs That Open The SPARQL Query:

D2RQ Platform by Open Source

Windows

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RQ File Complications

Issues Opening RQ Files

D2RQ Platform Removed

If you attempt to load your RQ file, you experience a message such as "Can't Open RQ Files". When this happens, it is commonly due to D2RQ Platform missing in %%os%%. The OS won't know what to do with your RQ file, so double-clicking to load the file doesn't work.

Tip: If you don't have D2RQ Platform installed, and you know of another program to open your RQ file, you can try opening it by selecting from the programs listed under "Show Apps".

D2RQ Platform Requires Update

Your SPARQL Query file is incompatible with D2RQ Platform because you might have the wrong version installed. Download the latest D2RQ Platform version from the Open Source website to ensure you have the correct one installed. This problem is predominately due to having a SPARQL Query file version that was created by a newer version of D2RQ Platform than what you have installed on your PC.

Tip: If you right-click on your RQ file, then select "Properties" (Windows) or "Get Info" (Mac), you can obtain hints about what version you need.

Summary: Not having the right D2RQ Platform version on your computer can cause problems opening RQ files.

More Causes of Problems Opening RQs

In the majority of cases, installing the right version of D2RQ Platform will resolve your issue. If you're still experiencing problems opening RQ files, there could be other computer problems. These issues include:

• File references in the Windows Registry for RQ are wrong
• Unintentional removal of the description of the RQ file inside the Windows Registry
• Partial installation of D2RQ Platform that did not fully complete
• Your RQ file is corrupted (issues with your SPARQL Query file itself)
• Your RQ has adversely impacted by malware
• Device drivers of the hardware associated with your RQ file are corrupt or out-of-date
• Too many applications are open on your PC to load your SPARQL Query file successfully