Salt sls files can include other sls files and exclude sls files that have been otherwise included. This allows for an sls file to easily extend or manipulate other sls files.
The exclude statement, added in Salt 0.10.3 allows an sls to hard exclude another sls file or a specific id. The component is excluded after the high data has been compiled, so nothing should be able to override an exclude.
Since the exclude can remove an id or an sls the type of component to exclude needs to be defined. an exclude statement that verifies that the running highstate does not contain the http sls and the /etc/vimrc id would look like this:
exclude:
- sls: http
- id: /etc/vimrc