Extended metadata oc 2015
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Transcript of Extended metadata oc 2015
Extended MetadataManchester Opencast Conference 2015
Christoph Drießen [email protected]
for the open minded
– for the open minded
What is metadata?
Enrich artifacts with structured informationtitle, author, date, ... Software components needed to make use of itvideo portal, admin UI, cover image generator, ...
– for the open minded
Metadata in Matterhorn
Adopts DublinCore standardOrdered name/value pairs with optional language and type annotation Metadata is organised in catalogs
Completely arbitrary metadata possibleThrough attachments but lacks common support
– for the open minded
What is extended metadata?
Extended metadata <=> custom metadata
Metadata semantically not covered by the DublinCore standard
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Extended metadata examples
Organisation specific metadata- Internal IDs and references- Links to associated resources- ...
Technical metadata - Metadata not meant for human consumption - Processing instructions- Visibility instructions- ...
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Use of metadata
Display
Searching & querying
ProcessingRequires software components DisseminationOAI-PMH, ...
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Getting metadata into Matterhorn
As an arbitrary attachment or catalog
Via the new Admin UI!
– for the open minded
Metadata challenges
No standardised set of metadata
No standardised value formatsDates, names, spatial information, ...
→ Generic editing capabilities
→ Generic search capabilities not yet available!
First name, Last name Position
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01
Extended metadata and the new Admin
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Overview
Extended metadata conforms to DublinCore standard for metadata representation
Defined by config file per metadata setmetadata set <=> catalog Viewing & editing per episode and series
Currently not searchable
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Roll your own
config file
load/ directory
view & edit
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Metadata set config fileorg.opencastproject.ui.metadata.CatalogUIAdapterFactory-catalog-name.cfg
Standard .properties format
Place in load/ directory of Matterhorn
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What's configurable?
series or episode multi-tenancy namespaces
read-only required
data types resulting in different UI elements
controlled vocabulary via ResourceListProviders
order definition
customisable date and time formats
– for the open minded
Example config file# The catalog type, either 'events' or 'series'type=events# The tenants organizationorganization=mh_default_org# The mediapackage element flavor type and subtype# Anything can be used instead of "mycompany", for example "metadata", "client", etc.# Note: The flavor should not contain any special character!flavor=ethterms/episode# The title of the catalog# This will show in the header of the section where the metadata are displayedtitle=ETH Extended Metadata# Name of the XML root element of the serialized catalogxml.rootElement.name=ethterms# Namespace binding for the XML root elementxml.rootElement.namespace.URI=http://ethz.ch/video/opencast# XML namespace bindingsxml.namespaceBinding.root.URI=http://ethz.ch/video/opencastxml.namespaceBinding.root.prefix= xml.namespaceBinding.terms.URI=http://ethz.ch/video/metadataxml.namespaceBinding.terms.prefix=ethterms
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Example config file, continued##### Field Definitions ###### Accessibility Descriptionproperty.accessibilityDescription.inputID=accessibilityDescriptionproperty.accessibilityDescription.label=Accessibility Descriptionproperty.accessibilityDescription.type=textproperty.accessibilityDescription.readOnly=falseproperty.accessibilityDescription.required=falseproperty.accessibilityDescription.namespace=http://ethz.ch/video/metadataproperty.accessibilityDescription.order=1 # Orderproperty.order.inputID=orderproperty.order.label=Orderproperty.order.type=textproperty.order.readOnly=falseproperty.order.required=falseproperty.order.namespace=http://ethz.ch/video/metadataproperty.order.order=2 # Ownerproperty.owner.inputID=ownerproperty.owner.label=Ownerproperty.owner.type=textproperty.owner.readOnly=falseproperty.owner.required=falseproperty.owner.namespace=http://ethz.ch/video/metadataproperty.owner.order=3
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Controlled vocabulary
Vocabulary provided by ResourceListProvidersOSGi component Rendered as drop down or labelssingle or multiple values Vocabulary may be static or dynamic
– for the open minded
Controlled vocabulary
Vocabulary provided by ResourceListProvidersOSGi component Rendered as drop down or labelssingle or multiple values Vocabulary may be static or dynamic
# Seriesproperty.series.inputID=isPartOfproperty.series.label=EVENTS.EVENTS.DETAILS.METADATA.SERIESproperty.series.type=textproperty.series.readOnly=falseproperty.series.required=falseproperty.series.listprovider=SERIESproperty.series.order=6
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Controlled vocabulary
Vocabulary provided by ResourceListProvidersOSGi component Rendered as drop down or labelssingle or multiple values Vocabulary may be static or dynamic
AclListProvider AgentsListProvider
BlacklistsListProvider CommentsListProvider
ContributorsListProvider EmailListProvider
EventsListProvider GroupsListProvider JobsListProvider
LanguagesListProvider ParticipationListProvider
RolesListProvider SeriesListProvider
ServersListProvider ServicesListProvider
SingleResourceListProvider ThemesListProvider UsersListProvider
WorkflowsListProvider
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Data types
Affect backend processing Date parsing, property generation, ... Affect UI input element
Extendable Frontend and backend work required
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Data types
Affect backend processing Date parsing, property generation, ... Affect UI input element
Extendable Frontend and backend work required
text text_long iterable_text mixed_text boolean
date start_date start_time duration
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Pattern suitable for Java's DateTimeFormatter
Date & time format
# Createdproperty.created.inputID=createdproperty.created.label=EVENTS.EVENTS.DETAILS.METADATA.CREATEDproperty.created.type=dateproperty.created.readOnly=trueproperty.created.required=falseproperty.created.pattern=yyyy-MM-dd'T'HH:mm:ss'Z'property.created.order=15
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Summary
New Admin UI features viewing and editing capabilities for customisable metadata sets
Available since Matterhorn 2.0
Live demo instance @ https://opencast.entwinemedia.com/
Documentation is about to come ;-)
– for the open minded
Questions?
Thanks for your attention!