Modification LAD du 28 février 2006 Changement de nameSpace . Création du nameSpace "http://bibnum.bnf.fr/ns/alto_prod" ALTO (analyzed layout and text object) stores layout information and OCR recognized text of pages of any kind of printed documents like books, journals and newspapers. ALTO is a standardized XML format to store layout and content information. It is designed to be used as an extension schema to METS (Metadata Encoding and Transmission Standard), where METS provides metadata and structural information while ALTO contains content and physical information. Describes general settings of the alto file like measurement units and metadata All measurement values inside the alto file except fontsize are related to this unit. The default is 1/10 of mm Styles define properties of layout elements. A style defined in a parent element is used as default style for all related children elements. Modification LAD du 28 février 2006 Elément rendu obligatoire. A text style defines font properties of text. A paragraph style defines formatting properties of text blocks. Indicates the alignement of the paragraph. Could be left, right, center or justify. Left indent of the paragraph in relation to the column. Right indent of the paragraph in relation to the column. Line spacing between two lines of the paragraph. Measurement calculated from baseline to baseline. Indent of the first line of the paragraph if this is different from the other lines. A negative value indicates an indent to the left, a positive value indicates an indent to the right. The root layout element. One page of a book or journal. The area between the top line of print and the upper edge of the leaf. It may contain page number or running title. The area between the printspace and the left border of a page. May contain margin notes. The area between the printspace and the right border of a page. May contain margin notes. The area between the bottom line of letterpress or writing and the bottom edge of the leaf. It may contain a page number, a signature number or a catch word. Rectangle covering the printed area of a page. Page number and running title are not part of the print space. Any user-defined class like title page. The number of the page within the document. The page number that is printed on the page. Position of the page. Could be lefthanded, righthanded, foldout or single if it has no special position. Modification LAD du 28 février 2006 Attribut rendu obligatoire. A link to the processing description that has been used for this page. ajout LAD du 7 novembre 2005. Permet d'identifier les fichiers. Modification du 04 décembre 2007 - définition du pattern de /alto/@ID avec longueur de 6 ou 7 caractères Modification du 20 mai 2011 - modification du pattern de /alto/@ID : une longueur de 8 caractères est désormais acceptée Group of available block types A block of text. A picture or image. A graphic used to separate blocks. Usually a line or rectangle. A block that consists of other blocks Base type for any kind of block on the page. Tells the rotation of the block e.g. text or illustration. The value is in degree counterclockwise. The next block in reading sequence on the page. A sequence of chars. Strings are separated by white spaces or hyphenation chars. Any alternative for the word. Identifies the purpose of the alternative. Modification LAD du 28 février 2006 Attribut rendu obligatoire. Type of the substitution (if any). Content of the substiution. Modification LAD du 28 fvrier 2006 Attribut rendu obligatoire. Word Confidence: Confidence level of the ocr for this string. A value between 0 and 1. Ajout du 04 décembre 2007 Specifies whether the word was found in the dictionary. Confidence level of each character in that string. A list of numbers, one number between 0 and 9 for each character. Ajout CLE JPT du 18 janvier 2012 A controlled string to identify the type of a string element. A region on a page A list of points Describes the bounding shape of a block, if it is not rectangular. A polygon shape. An ellipse shape. A circle shape. Formatting attributes. Note that these attributes are assumed to be inherited from ancestor elements of the document hierarchy. The font name. The font size, in points (1/72 of an inch). Font color as RGB value Serif or Sans-Serif fixed or proportional Information to identify the image file from which the OCR text was created. Modification LAD du 28 février 2006 Syntaxe contrainte à une série de valeurs attendues A unique identifier for the image file. This is drawn from MIX. This identifier must be unique within the local system. To facilitate file sharing or interoperability with other systems, fileIdentifierLocation may be added to designate the system or application where the identifier is unique. A location qualifier, i.e., a namespace. Information on how the text was created, including preprocessing, OCR processing, and postprocessing steps. Where possible, this draws from MIX's change history. A processing step. Date or DateTime the image was processed. Identifies the organizationlevel producer(s) of the processed image. An ordinal listing of the image processing steps performed. For example, "image despeckling." A description of any setting of the processing application. For example, for a multi-engine OCR application this might include the engines which were used. Ideally, this description should be adequate so that someone else using the same application can produce identical results. Information about a software application. Where applicable, the preferred method for determining this information is by selecting Help --> About. The name of the organization or company that created the application. The name of the application. The version of the application. A description of any important characteristics of the application, especially for non-commercial applications. For example, if a non-commercial application is built using commercial components, e.g., an OCR engine SDK. Those components should be mentioned here. List of any combination of font styles A block that consists of other blocks A user defined string to identify the type of composed block (e.g. table, advertisement, ...) An ID to link to an image which contains only the composed block. The ID and the file link is defined in the related METS file. A picture or image. A user defined string to identify the type of illustration like photo, map, drawing, chart, ... A link to an image which contains only the illustration. A graphic used to separate blocks. Usually a line or rectangle. Ajout LAD du 7 novombre 2005 A user defined string to identify the type of graphical element. A block of text. A single line of text. A white space. A hyphenation char. Can appear only at the end of a line. Ajout LAD du 7 novombre 2005 A user defined string to identify the type of text block.