WEBVTT

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Case 1 · Same name, different meaning. Is "export value" the same in both datasets?

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Both datasets have an "export value" column. Their current metadata records no unit, currency or frequency.

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Question: compare the 2025 semiconductor export value in the two datasets.

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Because the column names match, the agent treats them as the same and compares 11,800 with 190,000 as they are.

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Without a manifest: "Dataset B is about 16 times dataset A." A confident wrong answer, and no error message.

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With a manifest: sum monthly to annual (144,000 thousand USD), convert the currency (194,400 million KRW), then compare in the same unit.

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The two figures agree within about 2%. The rate of 1,350 KRW/USD is an assumption; figures are illustrative.

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Machine-readable vocabulary: unit/currency, multiplier, frequency — reusing SDMX concepts and code lists rather than inventing new ones. This is a proposed revision.

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The same name does not guarantee the same meaning. Meaning must be recorded with the data in machine-readable vocabulary.