Data Provenance for Commercial Property: Source, Date, Confidence
Provenance is the answer to three questions about any value: where it came from, when it was captured, and how confident we are in it. DealMap Intel models provenance at the level of the individual field rather than the whole record, so a single parcel can hold a freshly verified owner beside an aging, lower-confidence lot dimension without either misleading the analyst.
What is field-level data provenance for commercial property?
It is a small record attached to each individual value — not to the property as a whole — capturing the source that supplied it, the date it was observed, and a confidence level describing how strongly that source supports it. Because provenance lives at the field level, one parcel can carry a high-confidence recent ownership fact alongside a low-confidence stale measurement, and the analyst sees exactly which is which.
Whole-record provenance is a common shortcut and a costly one. Stamping a single 'last updated' date on an entire property implies every field inside it shares that freshness, when in reality ownership might come from one register captured this month while a building characteristic was last touched years ago. Modeling provenance per field refuses that fiction. Each value earns its own lineage, and the property becomes a bundle of independently traceable facts rather than one opaque blob.
The three coordinates of a provenance record
- Source — the specific authoritative record the value was drawn from, identified precisely enough to return to it.
- Date — when the value was true according to that source, distinct from when our pipeline happened to fetch it.
- Confidence — a graded assessment reflecting the source's authority, the value's recency, and whether other records corroborate it.
Source and date are observable facts about where a value originated. Confidence is a judgment we compute from them and from corroboration. Keeping the observed inputs separate from the derived confidence matters: if an analyst disagrees with a confidence grade, they can inspect the underlying source and date and reach their own conclusion rather than arguing with an opaque score.
Where the underlying sources come from
The authority behind a value determines the ceiling on its confidence. County appraisal districts and assessors maintain public parcel-level ownership and characteristics, which are the primary source for a property's identity and physical facts. The U.S. Census Bureau publishes housing and demographic estimates through the American Community Survey on a fixed annual schedule, framing the surrounding market. Federal agencies publish flood hazard data, such as the National Flood Hazard Layer, informing risk fields. Each of these carries a publication date that flows straight into the provenance record.
| Field | Source type | Confidence driver |
|---|---|---|
| Recorded owner | County appraisal record | Recent capture, high authority |
| Flood zone | Federal hazard layer | Authoritative, revised periodically |
| Area demographics | Census survey estimate | Fixed schedule, framed as estimate |
| Lot dimension | Older register entry | Aging date lowers confidence |
How confidence is graded
Confidence combines source tier (the authority of the record), recency (how far the source date sits from today), and corroboration (whether independent records agree). A value from a strong source, captured recently, and matched by a second record grades high. A value that is old, singular, or from a weaker record grades lower. A value that cannot be sourced at all is not assigned a confidence — it is marked unknown and left blank.
- —Confidence is an ordered judgment, not a probability that a specific transaction will occur.
- —A high-confidence field can still be wrong if the underlying public record itself contains an error.
- —Provenance describes where a value came from; it does not itself perform legal, tax, or investment analysis.
Frequently asked questions
Why track provenance per field instead of per property?
Because freshness and authority vary field by field. A single date on a whole record hides that variation and lets a stale measurement borrow credibility from a fresh ownership fact. Field-level provenance keeps each value honest about its own age and origin.
Can confidence change over time?
Yes. As a source ages, recency pressure lowers confidence until a refresh restores it, and new corroborating records can raise it. Confidence is recomputed from the current source, date, and corroboration rather than frozen at first capture.
Inspect the lineage behind every field.