#################################################################################################### # # Invoking X3D model self-test: # # $ python XmpMetadataEmbedded.py # # Python package x3d.py package is available on PyPI for import. # This approach simplifies Python X3D deployment and use. # https://pypi.org/project/x3d # # Installation: # pip install x3d # or # python -m pip install x3d # # Developer options for loading x3d package in other Python programs: # # from x3d import * # preferred approach, terser source that avoids x3d.* class prefixes # # or # import x3d # traditional way to subclass x3d package, all classes require x3d.* prefix, # # but python source is very verbose, for example x3d.Material x3d.Shape etc. # # X3dToPython.xslt stylesheet insertPackagePrefix=true supports this option. # # Project home page: # X3D Python Scene Access Interface Library (X3DPSAIL) # # https://www.web3d.org/x3d/stylesheets/python/python.html # Conversion generator: # https://www.web3d.org/x3d/stylesheets/X3dToPython.xslt # #################################################################################################### from x3d import * newModel=X3D(profile='Immersive',version='4.0', head=head( children=[ Comment('of note is that name values for these document meta terms are defined by Dublin Core'), meta(content='XmpMetadataEmbedded.x3d',name='title'), meta(content='Simple XMP sidecar example: Hello XMP metadata!',name='description'), meta(content='29 April 2021',name='created'), meta(content='15 July 2025',name='modified'), meta(content='Don Brutzman, Vince Marchetti, Jakub Flotynski, Dick Puk',name='creator'), meta(content='Source model assumes default containerField=value for X3D4 Metadata nodes, specification resolution needed',name='warning'), meta(content='Summary presentation XmpMetadataSupportX3D.pptx',name='reference'), meta(content='XmpMetadataSidecar.xml',name='reference'), meta(content='XmpMetadataSidecar.rdf',name='reference'), meta(content='XmpMetadataSidecar.ttl',name='reference'), meta(content='Protege https://protege.stanford.edu',name='generator'), meta(content='XmpMetadataEmbeddedX3dComparison.png',name='Image'), meta(content='https://www.web3d.org/specifications/X3Dv4/ISO-IEC19775-1v4-IS/Part01/components/core.html#MetadataSet',name='reference'), Comment('Wikipedia example RDF XML plus Protege conversion to Turtle .ttl'), meta(content='XmpMetadataExampleWikipedia.xml',name='reference'), meta(content='XmpMetadataExampleWikipedia.ttl',name='reference'), meta(content='https://wwwimages2.adobe.com/content/dam/acom/en/devnet/xmp/pdfs/XMP%20SDK%20Release%20cc-2016-08/XMPSpecificationPart1.pdf',name='reference'), meta(content='Once pattern OK, write conversion stylesheets XmpToX3dMetadata.xslt and X3dMetadataToXmp.xslt',name='TODO'), meta(content='X3D support for xml:lang attribute not provided in X3D XML Schema, instead use MetadataString as best practice.',name='info'), meta(content='Wikipedia XMP https://en.wikipedia.org/wiki/Extensible_Metadata_Platform',name='reference'), meta(content='Wikipedia Metadata https://en.wikipedia.org/wiki/Metadata',name='reference'), meta(content='https://en.wikipedia.org/wiki/Sidecar',name='reference'), meta(content='https://experienceleague.adobe.com/docs/experience-manager-64/assets/administer/xmp.html',name='reference'), meta(content='https://en.wikipedia.org/wiki/Ontology_for_Media_Resources',name='reference'), meta(content='https://en.wikipedia.org/wiki/Multimedia_Web_Ontology_Language',name='reference'), meta(content='W3C Ontology for Media Resources 1.0 https://www.w3.org/TR/mediaont-10',name='reference'), meta(content='ISO XMP ISO 16684-1:2019Part 1: Data model, serialization and core properties https://www.iso.org/standard/75163.html',name='reference'), meta(content='ISO XMP 16684-2:2014 Part 2: Description of XMP schemas using RELAX NG https://www.iso.org/standard/57422.html',name='reference'), meta(content='Adobe XMP https://www.adobe.com/devnet/xmp.html',name='reference'), meta(content='Adobe XMP https://www.adobe.com/products/xmp.html',name='reference'), meta(content='ExifTool XMP Tags https://exiftool.org/TagNames/XMP.html',name='reference'), meta(content='https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter15Metadata/XmpMetadataEmbedded.x3d',name='identifier'), meta(content='https://www.web3d.org/x3d/content/examples/license.html',name='license'), meta(content='X3D-Edit 4.0, https://www.web3d.org/x3d/tools/X3D-Edit',name='generator')]), Scene=Scene( children=[ Comment('Design considerations:'), Comment('a. avoid containerField=\'metadata\' and containerField=\'value\' wherever possible, note X3D4 XML schema revision is needed'), Comment('b. literal XMP values wherever possible, lossless'), Comment('c. avoid nested quotes/apostrophes by using MetadataString name/value pairs'), Comment('d. map XMP parent elements to MetadataSet, otherwise have typed Metadata* values wherever possible'), Comment('e. push shared properties as high as possible in MetadataSet hierarchy, since they apply to all children'), Comment('f. assumptions: unquoted MFString values equal a single SFString array element, default Metadata* node containerField=\'value\''), Comment('g. MetadataSet nodes contain other Metadata* nodes as the /value/ field, thus producing tree-like structured metadata information'), WorldInfo(title='XmpMetadataEmbedded.x3d'), Background(skyColor=[(0,0.439216,0.760784)]), Comment('Sample (partial) XMP sidecar file XmpMetadataSidecar.xml generated manually by Vince Marchetti as part of the STEP Geometry Services Pilot Project'), MetadataSet(name='rdf:RDF',reference='TODO refer to XMP ISO specification document', value=[ MetadataSet(name='namespaces', value=[ MetadataString(name='xmlns:rdf',value=['http://www.w3.org/1999/02/22-rdf-syntax-ns#']), MetadataString(name='xmlns:dc',value=['http://purl.org/dc/elements/1.1/']), MetadataString(name='xmlns:xmp',value=['http://ns.adobe.com/xap/1.0/'])]), MetadataSet(name='rdf:Description', value=[ MetadataString(name='rdf:about',value=['https://kshell.com/sgs/example_uri_0001/']), MetadataSet(name='dc:description', value=[ MetadataSet(name='rdf:Alt', value=[ MetadataString(name='rdf:li',value=['VRML visualization'], # discouraging direct use of xml:lang='en' as an attribute, since that is legal XML but invalid X3D metadata=MetadataString(name='xml:lang',reference='prefer using MetadataString to indicate xml:lang values',value=['en']))])]), MetadataString(name='dc:format',value=['model/x3d-vrml']), MetadataString(name='dc:rights',reference='https://www.dublincore.org/specifications/dublin-core/dcmi-terms/terms/rights/',value=["open source"]), MetadataSet(name='dc:title', value=[ MetadataSet(name='rdf:Alt', value=[ MetadataString(name='rdf:li',reference="xml:lang='en'",value=['l-bracket_20120725.134815'], metadata=MetadataString(name='xml:lang',value=['en'])), MetadataString(name='rdf:li',reference="xml:lang='gr'",value=['aristsirra-bracket_20120725.134815'], metadata=MetadataString(name='xml:lang',reference='prefer using MetadataString to indicate xml:lang values',value=['en']))]), MetadataSet(name='dc:creator', value=[ MetadataSet(name='rdf:Seq', value=[ MetadataString(name='rdf:li',value=['vmarchetti@kshell.com'])])]), MetadataString(name='xmp:CreateDate',value=['10 February 2021'])])])]), Viewpoint(description='View scene source to see metadata examples',position=(0,0,9)), Anchor(description='Load scene index page',parameter=["target=_blank"],url=["XmpMetadataEmbeddedIndex.html","https://www.web3d.org/x3d/content/examples/X3dForWebAuthors/Chapter15Metadata/XmpMetadataEmbeddedIndex.html"], children=[ Shape( geometry=Text(string=["View scene source","to see","XmpMetadataEmbedded","example"], fontStyle=FontStyle(justify=["MIDDLE","MIDDLE"])), appearance=Appearance( material=Material(diffuseColor=(1,0.992157,0.039216))))])]) ) ### X3D model conversion complete ### #################################################################################################### # Self-test diagnostics #################################################################################################### print('Self-test diagnostics for XmpMetadataEmbedded.py:') if metaDiagnostics(newModel): # built-in utility method in X3D class print(metaDiagnostics(newModel)) # display meta info, hint, warning, error, TODO values in this model # print('check newModel.XML() serialization...') newModelXML= newModel.XML() # test export method XML() for exceptions during export newModel.XMLvalidate() # print(newModelXML) # diagnostic try: # print('check newModel.VRML() serialization...') newModelVRML=newModel.VRML() # test export method VRML() for exceptions during export # print(prependLineNumbers(newModelVRML)) # debug print("Python-to-VRML export of VRML output successful", flush=True) except Exception as err: # usually BaseException # https://stackoverflow.com/questions/18176602/how-to-get-the-name-of-an-exception-that-was-caught-in-python print("*** Python-to-VRML export of VRML output failed:", type(err).__name__, err) if newModelVRML: # may have failed to generate print(prependLineNumbers(newModelVRML, err.lineno)) try: # print('check newModel.JSON() serialization...') newModelJSON=newModel.JSON() # test export method JSON() for exceptions during export # print(prependLineNumbers(newModelJSON)) # debug print("Python-to-JSON export of JSON output successful (under development)") except Exception as err: # usually SyntaxError print("*** Python-to-JSON export of JSON output failed:", type(err).__name__, err) if newModelJSON: # may have failed to generate print(prependLineNumbers(newModelJSON,err.lineno)) print("python XmpMetadataEmbedded.py load and self-test diagnostics complete.")