requires(+Requirements)

Other required script and css files. If this is a plain file name, it is interpreted relative to the declared resource. Requirements can be a list, which is equivalent to multiple requires properties.

virtual(+Bool)

If true (default false), do not include About itself, but only its dependencies. This allows for defining an alias for one or more resources.

ordered(+Bool)

Defines that the list of requirements is ordered, which means that each requirement in the list depends on its predecessor.

aggregate(+List)

States that About is an aggregate of the resources in List. This means that if both About and one of the elements of List appears in the dependencies, About is kept and the smaller one is dropped. If there are a number of dependencies on the small members, these are replaced with dependency on the big (aggregate) one, for example, to specify that a big javascript is actually the composition of a number of smaller ones.

mime_type(-Mime)

May be specified for non-virtual resources to specify the mime-type of the resource. By default, the mime type is derived from the file name using file_mime_type/2.

Registering the same About multiple times extends the properties defined for About. In particular, this allows for adding additional dependencies to a (virtual) resource.