<?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">Ornithischia</dc:title><dc:identifier>http://AATesaurus.cultura.gencat.cat/aat/getty_en?tema=31455487</dc:identifier><dc:language>en</dc:language><dc:publisher xml:lang="en">Getty Institute</dc:publisher><dcterms:created>2026-03-30 21:02:36</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">Predentata</dcterms:alternative> <dcterms:alternative xml:lang="en">bird-hipped dinosaurs</dcterms:alternative> <dcterms:alternative xml:lang="en">ornithischian</dcterms:alternative> <dcterms:alternative xml:lang="en">ornithischians</dcterms:alternative> <dc:description xml:lang="en"><![CDATA[ Extinct order of obligate bipedal or quadrupedal, beaked, herbivorous dinosaurs characterized by a pelvic structure like that of birds, a beak-like structure in the front part of the mouth and grinding teeth in the rear, a four-branched pelvis, toes that often have hooflike structures., and often having heavy armor and horns. Dating from the Upper Triassic to Upper Cretaceous, existed in five major groups: ornithopods, pachycephalosaurs, stegosaurs, ankylosaurs, and ceratopsina dinosaurs. ]]></dc:description></metadata>