Use BP Tags to do something more

What about tags?
I think tags can be used  to do more than simply tag an item to understand what kind of item the robot is working on.
Indeed we thank about a new way to use it, just replicating the .NET Dictionary ToString().

You can represent a dictionary as a set of key-value like this:

Key1:Value1;Key2:Value2;Key3:Value3;

And yeah using just a bit of code, you play with tags.
Look at this diagram, here we play with tags using a custom code

Dim patternTag As New Regex("(" + tagkey + ":)+([^;]){0,}")
Dim patternKey As New Regex("(" + tagkey + ":)+")
Dim match As Match
Dim value As String

match = patternTag.Match(tagString)

If match.Success Then
 valueTag = match.Value.TrimEnd(";")
 value = patternKey.Replace(valueTag, "")
 valueTag2 = valueTag.Replace(value, newValue)
 success = True
Else
 valueTag2 = tagKey + ":" + newValue
 success = False
End If

At first we get all data from tags from a particular item in the queue, and we look for all values of type Key1:whatever (note that, in our case is Key:Value and for BP is just one tag), so we delete pre-existing Key1:Value1 and we add Key1:NewValue.
It's clear that we assume that every tag of type Key-i:value is considered singleton.

With this configuration we can do interesting things, for example track technical statuses.
More generally, when you work with a process (expecially if attended), you have different phases, which can be matched with BP Item statuses.
In a singular phase, you can do lot of operations, and if the phase failed, it's normal to repeat the phase.
Sometimes you cannot redo some operations (maybe the robot is paying someone) and you don't want to split the original phase more phases (so not using the status) because of business rules.
So, assuming we are in Status S1, you do the Operation1 on a particular system and after that the robot crashes, when the robot retry the process, you can design the process so, if in state S1, the step Operation1 is skipped.

As usual, thanks to Antonio Durante and Raffaele Ecravino :-)