What's the meaning of the Weave macro

I've multiple times got the advise in this forum to use the Weave macro instead of weaving rules. This works fine so far, but I've never got a clear explanation of the semantic of this macro. And I've never found any documentation about it.
I've thought it's just a short cut for a Loop macro with a nested call macro. But now I wanted to generate the content of a PropertiesFile from a list of nodes, where each node produces multiple properties. I've tried this with the weave macro and failed. The Loop variant in contrast works as expected. So, what's the difference?

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