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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Another thing that comes very close is this: https://github.com/hzdgopher/4klang This is a synth supposed to produce a size-compact output suitable for demos and similar scenarios. It does not create a XML (merely the opposite) but the main point is that the principles are close to what you are describing.
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