.RELS File Extension

Relationships File

RELS files are saved in the _rels folder of XML documents. RELS files can be edited with standard text editors. Files with RELS extension can be found on any operating system, just like other file for...

General Information

Title RELS File Extension
Extension .rels
Full Form Relationships File
File Type XML Configuration File
Developer Microsoft
MIME Type application/vnd.openxmlformats-package.relationships+xml

File Function

Primary Function Define relationships
Additional Functions Link components
Features XML-based, Part of OPC

File Characteristics

Quality Structured data
Supports Layers N/A
Supports Transparency N/A
Editable Yes

Use Cases

Office Documents Yes
Packaging Formats Yes
File Linking Yes

Security and Practices

Security Risks XML External Entities
Best Practices Validation, Sanitization

Historical/Version Information

Initial Release 2007
Latest Version As per Office version

Associated Types

Similar Extensions .xml, .docx, .xlsx, .pptx

Software Compatibility

Software Usage Policy OS Compatibility
Microsoft Office Commercial Windows, Mac
LibreOffice Free Windows, Mac, Linux
Apache OpenOffice Free Windows, Mac, Linux