Updates an existing Tag. 

This method can be accessed through the Tags.asmx file located in:

~/Workarea/webservices/WebServiceAPI/Community/Tags.asmx

[SoapHeader("AuthHeader")]
[SoapHeader("RequestInfoHeader")]
[WebMethod(MessageName = "EditTag", Description = "Updates an existing Tag.")]
public TagData EditTag(ref TagData tag);

<SoapHeader("AuthHeader")>
<SoapHeader("RequestInfoHeader")>
<WebMethod(MessageName = "EditTag", Description = "Updates an existing Tag.")>
Public Function EditTag(ByRef tag As TagData) As TagData