Relate to related formats

[kba]

Like ALTO, Abbyy, Page.

Syntactically but more important: In scope/purpose.

Well, being able to represent engine-specific and intermediate information is the main point of hOCR. Having a uniform representation of OCR output is the point of ALTO. They are two different specs for two different purposes with two different use cases. https://github.com/kba/hocr-spec/issues/17#issuecomment-256131662

See also:

• https://github.com/kba/hocr-spec/wiki/OCR-Output-Formats
• https://github.com/kba/ocr-xsl/blob/master/OCR-Format-Comparison.md
• http://www.cis.lmu.de/ocrworkshop/data/slides/m6-abbyy-tesseract.pdf

[kba]

See also https://github.com/tmbdev/ocropy/issues/134

[kba]

'OCRopus File Formats' - Google Docs https://github.com/tmbdev/ocropy/issues/126