<?xml version="1.0" encoding="utf-8"?><metadata xmlns:dc="http://purl.org/dc/elements/1.1/"  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:dcterms="http://purl.org/dc/terms/"><dc:title xml:lang="en">x-ray</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31432064</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 20:56:33</dcterms:created><dcterms:isPartOf xsi:type="dcterms:URI">http://AATesaurus.cultura.gencat.cat/aat/getty_en</dcterms:isPartOf><dcterms:isPartOf xml:lang="en">Tesaurus d&apos;Art i Arquitectura</dcterms:isPartOf><dc:format>text/html</dc:format> <dcterms:alternative xml:lang="en">Roentgen rays</dcterms:alternative> <dcterms:alternative xml:lang="en">X-ray</dcterms:alternative> <dcterms:alternative xml:lang="en">X-rays</dcterms:alternative> <dcterms:alternative xml:lang="en">x-rays</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ High energy radiation (from some keV to 110 keV) with very short wavelengths (0.001 - 10 nm). X-rays were discovered by Wilhelm Conrad Röntgen in 1895. They can pass through materials, ionize gases, and expose photographic film. Widely used in medical diagnosis and treatment and in many analytical techniques. ]]></dc:description></metadata>