ConstReadonlyCallerTitle: 10A title explicitly provided by the caller (e.g. an uploaded file's display name).
ReadonlyContentTypeStructural: 7A content type recognised from the document's own structure.
ReadonlyDiscoveredContentType: 3A content type a source listing declared.
ReadonlyDiscoveredDate: 4A date from a source listing.
ReadonlyDiscoveredFileType: 3A file type from a source listing, before any bytes were seen.
ReadonlyDiscoveredTitle: 4A title from a source listing.
ReadonlyExtractorText: 6Text from an extractor that understands the format.
ReadonlyExtractorTitle: 6A title an extractor found in the document itself.
ReadonlyFallbackText: 2Text from the last-resort plain-text read — loses to any real extractor.
ReadonlyFileTypeByteCorrection: 9Byte evidence that unambiguously contradicts a declaration.
ReadonlyFileTypeDeclared: 7A type declared for this item. Authoritative unless bytes prove otherwise.
ReadonlyFileTypeExtension: 2A filename extension.
ReadonlyFileTypeSignature: 5A byte signature, where nothing was declared.
ReadonlyFileTypeSourceDefault: 1The source's default file type — describes the source, not the item.
ReadonlyModality: 6A modality detected from a recognised non-text format.
ReadonlySegmentText: 6A chunk's text, a verbatim slice of its parent's.
The default scale, ordered by how much each kind of evidence deserves to be believed.