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[FEATURE] Add support for ALTO v3 and v4 #1117

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merged 7 commits into from
May 21, 2024
Merged

[FEATURE] Add support for ALTO v3 and v4 #1117

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31e786e
make alto parser register multiple namespaces
michaelkubina-subhh Dec 21, 2023
2e13b2f
add Alto formats 3 and 4 in documentation
BFallert May 16, 2024
1fb7f01
Apply suggestions from code review
michaelkubina May 17, 2024
d8a0570
move namespace registration to seperate function
michaelkubina May 17, 2024
903281a
Merge pull request from BFallert
michaelkubina May 17, 2024
1b4e057
fix Codacy warnings
michaelkubina May 17, 2024
ff694d7
Merge branch 'master' into make_alto_parser_register_multiple_namespaces
sebastian-meyer May 21, 2024
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26 changes: 24 additions & 2 deletions Classes/Format/Alto.php
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Original file line number Diff line number Diff line change
Expand Up @@ -36,7 +36,19 @@
public function getRawText(\SimpleXMLElement $xml): string
{
$rawText = '';
$xml->registerXPathNamespace('alto', 'http://www.loc.gov/standards/alto/ns-v2#');

Check notice on line 39 in Classes/Format/Alto.php

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Classes/Format/Alto.php#L39 

Whitespace found at end of line
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// register ALTO namespace depending on document
$namespace = $xml->getDocNamespaces();
if (in_array('http://www.loc.gov/standards/alto/ns-v2#', $namespace, true)) {
$xml->registerXPathNamespace('alto', 'http://www.loc.gov/standards/alto/ns-v2#');
}
if (in_array('http://www.loc.gov/standards/alto/ns-v3#', $namespace, true)) {
$xml->registerXPathNamespace('alto', 'http://www.loc.gov/standards/alto/ns-v3#');
}
if (in_array('http://www.loc.gov/standards/alto/ns-v4#', $namespace, true)) {
$xml->registerXPathNamespace('alto', 'http://www.loc.gov/standards/alto/ns-v4#');
}

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// Get all (presumed) words of the text.
$strings = $xml->xpath('./alto:Layout/alto:Page/alto:PrintSpace//alto:TextBlock/alto:TextLine/alto:String');
$words = [];
Expand Down Expand Up @@ -68,7 +80,17 @@
*/
public function getTextAsMiniOcr(\SimpleXMLElement $xml): string
{
$xml->registerXPathNamespace('alto', 'http://www.loc.gov/standards/alto/ns-v2#');
// register ALTO namespace depending on document
$namespace = $xml->getDocNamespaces();
if (in_array('http://www.loc.gov/standards/alto/ns-v2#', $namespace, true)) {
$xml->registerXPathNamespace('alto', 'http://www.loc.gov/standards/alto/ns-v2#');
}
if (in_array('http://www.loc.gov/standards/alto/ns-v3#', $namespace, true)) {
$xml->registerXPathNamespace('alto', 'http://www.loc.gov/standards/alto/ns-v3#');
}
if (in_array('http://www.loc.gov/standards/alto/ns-v4#', $namespace, true)) {
$xml->registerXPathNamespace('alto', 'http://www.loc.gov/standards/alto/ns-v4#');
}
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// get all text blocks
$blocks = $xml->xpath('./alto:Layout/alto:Page/alto:PrintSpace//alto:TextBlock');
Expand Down