10.5.3 AddLink Method

This Method provides the capability to persistently add a link to an externally managed resource by adding a Variable according to the input arguments with a HasComponent Reference to the Object the Method is called on. The server shall manage the added link persistently, i.e., if the Method was executed successful, the Variable representing the link shall be persistent and available after restart of the Server. It might disappear after resetting or reconfiguring the Server or after calling the RemoveLink Method. The Value Attribute of the created Node should be writable, so the end-user can change the URI. In addition, the BrowseName, DisplayName, and Description might be writable. Servers might restrict the execution of this Method as well as writing the Attributes to specific users / roles.

The signature of this Method is specified below. Table 31 and Table 32 specify the Arguments and AddressSpace representation, respectively.

Signature

	AddLink (
	  [in]  0:UriString       LinkToExternalSource,
	  [in]  0:QualifiedName   BrowseName,
	  [in]  0:LocalizedText   DisplayName,
	  [in]  0:LocalizedText   Description,
	  [out] 0:NodeId          LinkVariable);

Method Result Codes (defined in Call Service)