It retrieves whatever information (in the form of an entity) is identified by the URI. If you use *, all schemes are allowed -including the schemes that are not selected.
You can specify another scheme in the Other field.It is only relevant when the Security Gateway is defined as a proxy for these protocols in the browser of the clients initiating the connection. Select the URI Schemes to which this resource applies.Getting Here - Object Explorer > New > Resource > URI > General > URI match specification type: Wildcards > Match - Wildcards page shows If a connection matches the source and destination of the rule and the match parameters of the Resource, then both the Action in the Rule and the Action in the Resource are applied. Use this window to configure how a connection is matched to a Resource in a rule.