A Spec is the name of a folder or file. Beyond Compare supports several different types of specs.
Local and network drives are represented using the syntax native to each platform:
Portable media devices (Android phones, MP3 players, cameras) are represented using the MTP syntax:
Webpages are represented using the HTTP syntax. This support only works for individual files, and cannot be used for base folders:
Live registries are represented using the standard syntax:
The clipboard is represented using this syntax: