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hocr2alto2.0.xsl
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hocr2alto2.0.xsl
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<?xml version="1.0" encoding="UTF-8"?>
<!--
Author: Filip Kriz (@filak)
Version: 1.3.1 13-9-2016
License: MIT License (MIT)
-->
<xsl:stylesheet version="2.0"
xmlns="http://www.loc.gov/standards/alto/ns-v2#"
xmlns:xlink="http://www.w3.org/1999/xlink"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:mf="http://myfunctions"
xpath-default-namespace="*"
exclude-result-prefixes="mf">
<xsl:output method="xml" encoding="utf-8" indent="yes" />
<xsl:strip-space elements="*"/>
<!-- Optional: ISO 639-2/B 3-letter code for default language -->
<xsl:param name="language" select="unknown" />
<xsl:variable name="langcodes" select="document('codes_lookup.xml')/*:codes/*:code" />
<xsl:template match="/">
<alto xsi:schemaLocation="http://www.loc.gov/standards/alto/ns-v2# http://www.loc.gov/standards/alto/v2/alto-2-0.xsd">
<xsl:apply-templates/>
</alto>
</xsl:template>
<xsl:template match="*:head">
<Description>
<MeasurementUnit>pixel</MeasurementUnit>
<sourceImageInformation>
<xsl:variable name="title" select="//*:body/*:div[@class='ocr_page']/@title"/>
<fileName><xsl:value-of select="mf:getFname($title)"/></fileName>
</sourceImageInformation>
<OCRProcessing ID="IdOcr">
<ocrProcessingStep>
<processingSoftware>
<softwareName><xsl:value-of select="*:meta[@name='ocr-system']/@content"/></softwareName>
<softwareVersion><xsl:value-of select="*:meta[@name='ocr-system']/@content"/></softwareVersion>
</processingSoftware>
</ocrProcessingStep>
</OCRProcessing>
</Description>
</xsl:template>
<xsl:template match="*:body/*:div[@class='ocr_page']">
<Layout>
<!-- bbox 552 999 1724 1141 x1-L2-T3-R4-B5 -->
<xsl:variable name="box" select="tokenize(mf:getBoxPage(@title), ' ')"/>
<Page ID="{@id}" PHYSICAL_IMG_NR="1" HEIGHT="{$box[5]}" WIDTH="{$box[4]}">
<PrintSpace HEIGHT="{$box[5]}" WIDTH="{$box[4]}" VPOS="0" HPOS="0">
<xsl:apply-templates select="*:div[@class='ocr_carea']"/>
</PrintSpace>
</Page>
</Layout>
</xsl:template>
<xsl:template match="*:div[@class='ocr_carea']">
<xsl:variable name="box" select="tokenize(mf:getBox(@title), ' ')"/>
<ComposedBlock ID="{@id}" HEIGHT="{number($box[5]) - number($box[3])}" WIDTH="{number($box[4]) - number($box[2])}" VPOS="{$box[3]}" HPOS="{$box[2]}">
<xsl:apply-templates select="*:p[@class='ocr_par']"/>
</ComposedBlock>
</xsl:template>
<xsl:template match="*:p[@class='ocr_par']">
<xsl:variable name="box" select="tokenize(mf:getBox(@title), ' ')"/>
<TextBlock ID="{@id}" HEIGHT="{number($box[5]) - number($box[3])}" WIDTH="{number($box[4]) - number($box[2])}" VPOS="{$box[3]}" HPOS="{$box[2]}">
<xsl:choose>
<xsl:when test="@lang != ''">
<xsl:variable name="lookup" select="@lang" />
<xsl:attribute name="language">
<xsl:value-of select="$langcodes[@a3h=$lookup]/@a3b" />
</xsl:attribute>
</xsl:when>
<xsl:when test="$language != 'unknown'">
<xsl:attribute name="language">
<xsl:value-of select="$language"/>
</xsl:attribute>
</xsl:when>
</xsl:choose>
<xsl:apply-templates select="*:span[@class='ocr_line']"/>
</TextBlock>
</xsl:template>
<xsl:template match="*:span[@class='ocr_line']">
<xsl:variable name="box" select="tokenize(mf:getBox(@title), ' ')"/>
<TextLine ID="{@id}" HEIGHT="{number($box[5]) - number($box[3])}" WIDTH="{number($box[4]) - number($box[2])}" VPOS="{$box[3]}" HPOS="{$box[2]}">
<xsl:apply-templates select="*:span[@class='ocrx_word']"/>
</TextLine>
</xsl:template>
<xsl:template match="*:span[@class='ocrx_word']">
<xsl:variable name="box" select="tokenize(mf:getBox(@title), ' ')"/>
<xsl:choose>
<xsl:when test="*:strong">
<String ID="{@id}" CONTENT="{normalize-space(.)}" HEIGHT="{number($box[5]) - number($box[3])}" WIDTH="{number($box[4]) - number($box[2])}" VPOS="{$box[3]}" HPOS="{$box[2]}" STYLE="bold"/>
</xsl:when>
<xsl:when test="*:em">
<String ID="{@id}" CONTENT="{normalize-space(.)}" HEIGHT="{number($box[5]) - number($box[3])}" WIDTH="{number($box[4]) - number($box[2])}" VPOS="{$box[3]}" HPOS="{$box[2]}" STYLE="italics"/>
</xsl:when>
<xsl:when test="*:i">
<String ID="{@id}" CONTENT="{normalize-space(.)}" HEIGHT="{number($box[5]) - number($box[3])}" WIDTH="{number($box[4]) - number($box[2])}" VPOS="{$box[3]}" HPOS="{$box[2]}" STYLE="italics"/>
</xsl:when>
<xsl:otherwise>
<String ID="{@id}" CONTENT="{normalize-space(.)}" HEIGHT="{number($box[5]) - number($box[3])}" WIDTH="{number($box[4]) - number($box[2])}" VPOS="{$box[3]}" HPOS="{$box[2]}" />
</xsl:otherwise>
</xsl:choose>
</xsl:template>
<xsl:function name="mf:getFname">
<xsl:param name="titleString"/>
<xsl:variable name="pPat">"</xsl:variable>
<xsl:variable name="fpath" select="tokenize(tokenize(normalize-space($titleString),'; ')[1],' ')[2]"/>
<xsl:value-of select="reverse(tokenize(replace($fpath,$pPat,''),'\\'))[1]"/>
</xsl:function>
<xsl:function name="mf:getBoxPage">
<xsl:param name="titleString"/>
<xsl:value-of select="tokenize(normalize-space($titleString),'; ')[2]"/>
</xsl:function>
<xsl:function name="mf:getBox">
<xsl:param name="titleString"/>
<xsl:value-of select="tokenize(normalize-space($titleString),'; ')"/>
</xsl:function>
</xsl:stylesheet>