I am building an ISA-95 tree and I am facing a problem, how can I know all my parent resources and grandparents and so on and so forth.
Can you suggest an API that has this information. Thanks!
While working on the ISA-95 hierarchy resolution for Resources, I came across a useful MES system endpoint that can simplify how we retrieve the Resource hierarchy: GetAscendentResources.
The problem
When we start with a Resource and need to determine its position in the ISA-95 hierarchy, we may need information about its parent Resources.
Production Line → ProcessResource
Without a way to retrieve the hierarchy directly, we would need to make multiple calls to MES, retrieving one parent at a time until we reach the top of the hierarchy.
This becomes particularly inefficient when the hierarchy contains several levels or when multiple Resources need to be resolved.
The solution: GetAscendentResources
While investigating the available MES system endpoints, I found the GetAscendentResources endpoint.
Instead of retrieving each parent Resource individually, this endpoint allows us to retrieve the Resource’s ascendant hierarchy in a single call.
This allows the hierarchy resolution logic to identify the relevant Production Line and Work Cell without repeatedly querying MES.
Takeaway
When working with Resource hierarchies, it is worth checking whether there is already a system endpoint that provides the hierarchy information you need.
In this case, `GetAscendentResources` can replace multiple parent-navigation calls with a single MES call, making the hierarchy resolution simpler and more efficient.
If you need to retrieve the complete Resource hierarchy, GetAscendentResources is definitely an endpoint worth knowing about.