this is what one can rip out of a picassa'd jpeg

referencePicassaXmp.xml

<x:xmpmeta xmlns:x=\"adobe:ns:meta/\" x:xmptk=\"XMP Core 5.1.2\">
<rdf:RDF xmlns:rdf=\"http://www.w3.org/1999/02/22-rdf-syntax-ns#\">
<rdf:Description rdf:about=\"\" xmlns:xmp=\"http://ns.adobe.com/xap/1.0/\" xmlns:mwg-rs=\"http://www.metadataworkinggroup.com/schemas/regions/\" xmlns:stDim=\"http://ns.adobe.com/xap/1.0/sType/Dimensions#\" xmlns:stArea=\"http://ns.adobe.com/xmp/sType/Area#\" xmlns:dc=\"http://purl.org/dc/elements/1.1/\" xmp:ModifyDate=\"2018-07-09T23:14:23+01:00\">
	<mwg-rs:Regions rdf:parseType=\"Resource\">
		<mwg-rs:AppliedToDimensions stDim:w=\"900\" stDim:h=\"1200\" stDim:unit=\"pixel\"/>
		<mwg-rs:RegionList>
			<rdf:Bag>
				<rdf:li>
				<rdf:Description mwg-rs:Name=\"Jean\" mwg-rs:Type=\"Face\">
				<mwg-rs:Area stArea:x=\"0.496936\" stArea:y=\"0.453125\" stArea:w=\"0.064134\" stArea:h=\"0.057598\" stArea:unit=\"normalized\"/>
				</rdf:Description>
				</rdf:li>
			</rdf:Bag>
		</mwg-rs:RegionList>
	</mwg-rs:Regions>
	<dc:creator>
	<rdf:Seq>
	<rdf:li>Picasa</rdf:li>
	</rdf:Seq>
	</dc:creator>
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>