I just wondered what the purpose of the @ symbol is in AF references? I have hunted high and low in all documentation but the only reference I see is in relation to filters which are used to restrict returned results, e.g. [category=pump].
I see it used often in references to PIPoint data references. For example if another attribute holds the name of a PITag, the @ symbol I believe says to use the string value of the referenced attribute rather than trying to use it directly as a PIPoint reference.
So I was confused when another variant turned up with AF-SDK programming
AFAttribute afAttribute = AFAttribute.FindAttribute(@"NuGreen\NuGreen\Houston|Environment", piSystem);
What is the purpose of the @ symbol here. The same syntax in SQL Commander for example shows N'NuGreen\NuGreen\Houston|Environment' which is different again.
Maybe this is so basic everyone assumes that it is clear; but for me it is not.
Can anyone help?