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README.md

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+---
+license: other
+language:
+- en
+tags:
+- destatis
+- germany
+- open-data
+- ml-ready
+- tabular
+---
+
+# umsatzindex-gebrauchsgueter-x13
+
+## Unofficial Notice
+This repository is a **private open-source project** and is **not an official** repository of the Federal Statistical Office of Germany (Destatis).
+
+## Data Explanation
+- Official dataset label: Umsatzindex Gebrauchsgüter mit Kalender- und Saisonbereinigung nach X13 JDemetra+
+- Source CSV: https://www.destatis.de/static/de_/opendata/data/umsatzindex_gebrauchsgueter_x13.csv
+- Source page: https://www.destatis.de/EN/Service/OpenData/short-term-indicators.html
+- Snapshot timestamp (UTC): 2026-05-12T14:16:36.268722+00:00
+
+## Overview
+This dataset contains a machine-learning-ready tabular version of a Destatis open-data series.
+The original CSV is transformed with deterministic preprocessing rules to support reproducible ML workflows.
+
+## Dataset Structure
+Files:
+- `data.csv`: normalized table
+- `README.md`: dataset card with provenance and processing notes
+
+Columns (sample):
+- `datum`
+- `originalwert_2021100`
+- `originalwert_vernderung_gegenber_vorjahresmonat_in_`
+- `saison_und_kalenderbereinigte_werte_nach_x_13_jdemetra_2021100`
+- `saison_und_kalenderbereinigte_werte_nach_x_13_jdemetra_vernderung_gegenber_vorsmonat_in_`
+
+## Field Notes
+- `datum`: time index / reporting period.
+- `originalwert_2021100`: raw/original value from source table.
+- `originalwert_vernderung_gegenber_vorjahresmonat_in_`: period-over-period or year-over-year change metric.
+- `saison_und_kalenderbereinigte_werte_nach_x_13_jdemetra_vernderung_gegenber_vorsmonat_in_`: period-over-period or year-over-year change metric.
+
+## Processing Pipeline
+The source CSV is processed without AI generation:
+- delimiter normalization
+- header normalization (`snake_case`)
+- missing-value token normalization
+- German numeric normalization (e.g. `1.234,56` -> `1234.56`)
+- row consistency checks
+
+## Data Quality Notes
+- Rows: 349
+- Columns: 5
+- Numeric columns ratio: 0.80
+- Missing ratio: 0.01
+- Quality note: ok
+
+## Official Context Snippet
+Official description from source metadata: Umsatzindex Gebrauchsgüter mit Kalender- und Saisonbereinigung nach X13 JDemetra+. This series is published by Destatis as part of its open data program.
+
+## Intended Use
+This dataset is suitable for:
+- time-series baseline modeling
+- tabular feature engineering
+- analytics and reproducible benchmarking
+
+## Limitations
+- Official revisions can update historical values.
+- Indicator semantics follow Destatis conventions and may require domain context.
+
+## License
+Source data rights follow the official Destatis open-data terms.
+Repository metadata uses `license: other` for Hugging Face compatibility.
+
+## Maintainer
+Maintained by the `destatis` Hugging Face organization (community-run, unofficial).