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Hi, I’m struggling to tag a set of features with an ID, input data looks like the left case in this image:

What I want is shown on the right. My input has a line of data with the ID, and it’s implied each record after that has that ID, until a record resets the ID for the subsequent features. 

Here’s a very similar example but differs from mine in that my ID is on a separate line: 

It seems like a Python caller might work, but I’m not very handy with Python & FME. Any suggestions welcome. Thanks in advance!

You can solve this using adjacent features and conditional logic.

You look at the previous feature and if it has an ID (a value in the second column) use that.

 

 

Thank you Hamish, you’re a star! :-)

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