Additional fields to a subnetline feature class

[MohamedIsmael]

How can i add these fields to my subnetline feature class like image below?

[DanPatterson]

It is read-only

SubnetLine feature class—ArcGIS Pro | Documentation

do your fields differ, or was it not created?

[MohamedIsmael]

it was not created

[RobertKrisher · Accepted solution]

@MohamedIsmael  can you be more specific? The feature class itself is read-only, but you can add fields to it (assuming you don't have any schema locks). The field is then populated when update subnetwork is run using the summary functions you have defined in your subnetwork definition.

[RobertKrisher · Accepted solution]

Add a field like you would on any other table/class (using one of the GP tools or the Field view), then use the Set Subnetwork Definition tool to configure summaries on your subnetwork definition that reference those fields. This is what the online help means when it says this:

[AneteZvaigzneLV]

Hello, same question. I did find the documentation, however it did not help me to understand all the different parameters that are defined in the Summaries part of tool. If it is needed to add a new field (I did not see it my list later in the summeries parameters) then why there is ''summary attribute'' field that to my understanding is for creating that new field? 

I am writing this from the Foundations Essential Model. Very sad that it does not contain at least one ''count my valves'' 😕 

Thank you in advance!