MHTML

MHTML is a MIME-like format which combines multiple documents in a single file. It's primarily used to store an HTML document along with its associated resources (images, style sheets, scripts, etc.).

Specifications

 * RFC 2557

Sample files

 * http://libxad.cvs.sourceforge.net/viewvc/libxad/testfiles/ASCII/mime/ → *.mht
 * Sample document saved from Windows Word 2007

Resources

 * Wikipedia article