Specified, the property is assigned to the element with the default value. Property is not disallowed but not explicitly In § 4 The properties of hOCR or begin with x_ to denote implementation-specific Property names must be either from those defined The name of a property must only consist of Note: When referring to a property bbox, this spec uses the notation bbox. They are serialized using a specific format in the title attribute of Information related to specific elements. HOCR Properties are a set of key-value pairs that convey OCR-specific This is entirely optional, it may not be possible orĭesirable to actually choose those tags (e.g., when adding hOCR information toĪn existing HTML output routine). If an HTML tag is an hOCR element, then its title attribute must not be used for any other purpose than to define hOCR properties and adhere to the properties format.įor some elements, the specs recommends using Note: When referring to an HTML tag with class ocr_page, this spec uses the Not use class names that begin with ocr_ or ocrx_. "element"Īn hOCR element (in this spec simply referred to as an element) is any HTML tag with a class attribute that contains exactly one class We are going to use the terms elements and properties for referring to embedded markup. We are embedding this information inside HTML by encoding it within valid tagsĪnd attributes inside HTML. Libraries for parsing and generating the content Used viewers (browsers), editors, conversion tools, and indexing tools Output files that are understood without any further modification by widely Standard representations for geometric layout and positioning Graphics, tables, languages, writing direction, colors Standard representations for fonts, embedded images, embedded vector Section headings, citations, tables, emphasis, line breaks, quotations, Standard representations for common logical structuring elements, including Need additional, separate and ad-hoc definitions. However, we are not actually using a new XML for the representation instead weĮmbed the representation in XHTML (or HTML) because and XHTML processingĪlready define many aspects of OCR output representation that would otherwise Tags, together with attributes of those tags. That is, we define a set of tags containing text and other This document describes a representation of various aspects of OCR output in an
Reusing HTML: Some text is missing in the first paragraph In tags will convey the page boundaries to hOCR-capable agents and turn the HTMLĭocument into an hOCR document. However, being built on top of HTML, hOCR isĭesigned to make it easy to start simple and gradually use more complexĬonsider you have an HTML document that encodes a book: Wrapping page elements This specification defines many features that can represent a That makes it easy to store, share, process and display OCR results. Reuse as much existing technology as possible, and to arrive at a representation The purpose of this document is to define an open standard for representingĭocument layout analysis and OCR results as a subset of HTML.
3.3.4 ocr_section, ocr_subsection and ocr_subsubsection.3.3.2 ocr_title, ocr_author and ocr_abstract.3.2.3 ocr_image, ocr_linedrawing and ocr_photo.2.3 Relationship between elements, properties.
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