Hi All,
I'm currently looking for a solution to the following problem. We would like to make a setup like this.
INTERNAL Tag Structure
location_1 > technical_category_1 > sub_category_1 > sub_category_n > type_1 > device_type_1 (points to UDT) > device_category_1 > sensors > output_1 > value_tag
location_1 > technical_category_1 > sub_category_1 > sub_category_n > type_1 > device_type_1 (points to UDT) > device_category_1 > sensors > output_1 > status_tag
EXTERNAL Tag Structure
location_1 > logical_category_1 > logical_sub_category_1 > value_tag
location_1 > logical_category_1 > logical_sub_category_1 > status_tag
The issue
For real-time values this is a breeze. We use a reference tag with the INTERNAL Source Path and ignition handels this gracefully. Where we are struggeling is with the history, we can't seem to find a way to make Perspective Dashboards use the history of the Source.
What we would like to avoid is having all data duplicated (currently at several gigabytes per day and this will scale-up quickly).
There are some tricks that we can do:
For example: Use the Source Path reference and Dynamically propagate the Source in the Perspective boards.
However, that does not permit us to use for example a Powerchart and use the EXTERNAL Tag Structure where we have more control on what needs to be exposed.
Is there any way in ignition to have the history also forwarded to a reference tag or any other solutions ( without going into the historian databases and performing unsupported operations 
)?