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How to express relationships between assets

By on February 1, 2011

PBCore may be used in more than one way to express relations between assets such as programs within a series, chapters within an episode, stories within a program and limitless other combinations.

The simplest approach is to put higher, container-level data next to lower, derivative-level data within the main asset (at the level of element pbcoreDescriptionDocument), using attributes to clarify which is which. For example, to express programs within a series:

<pbcoreDescriptionDocument>
    <!-- section removed for clarity -->
    <pbcoreTitle titleType="Series" source="PBCore Controlled Vocabulary" version="2.0">Sample Series Title</pbcoreTitle>
    <pbcoreTitle titleType="Program" source="PBCore Controlled Vocabulary" version="2.0">Sample Program Title</pbcoreTitle>
    <!-- section removed for clarity -->
</pbcoreDescriptionDocument>

Another, more extensive approach to express such relations is to put higher, container-level data within the main asset (at the level of element pbcoreDescriptionDocument) and put lower, derivative-level data within its sub-element structure “pbcorePart.” For example:

<pbcoreDescriptionDocument>
    <!-- section removed for clarity -->
    <pbcoreIdentifier source="WGBH">NATPRO_NOVA</pbcoreIdentifier>
    <pbcoreTitle titleType="Series" source="PBCore Controlled Vocabulary" version="2.0">NOVA</pbcoreTitle>
    <!-- section removed for clarity -->
    <pbcorePart>
        <!-- section removed for clarity -->
        <pbcoreIdentifier source="WGBH"  annotation="this relates to other data about the NOVA series">NATPRO_NOVA</pbcoreIdentifier>
        <pbcoreIdentifier source="WGBH" ref="http://www.pbs.org/wgbh/pages/NOVA/programs/" annotation="this identifies this program in the series">NOLA78334</pbcoreIdentifier>
        <pbcoreTitle titleType="Program" source="WGBH" version="2011" annotation="this is the 2011/02/01 broadcast title">TU9</pbcoreTitle>
        <!-- section removed for clarity -->
</pbcoreDescriptionDocument>

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Minnesota Public Radio

By on February 1, 2011

How we use PBCore

We use some PBCore elements, drawing from those in existence at the time we designed our database, some eight years ago. Once the system was launched that essentially froze our element structure. We haven’t had technical support to make major changes. PBCore itself has been in flux and it hasn’t been practical to alter our database to reflect the frequent revisions, or go back retrospectively and edit records. We’ve made some minor changes, primarily in controlled vocabulary with PBCore updates, but overall once our system was in place, that was it. We were early adopters and the way we use the elements reflects this.

Why we use PBCore

The advantage of PBCore is that it adds media and technical metadata particular to broadcasting, a standard that doesn’t exist with another schema. We were looking at standards to incorporate into the design of our in-house database. PBCore was in the developmental stages at that time, and was one of the standards we reviewed. In fact, MPR was part of an early group that made suggestions about element structure (some of which were adopted) and did initial PBCore testing. We incorporated as much as we could that seemed practical at that time. Some elements we chose were later supplanted with local variation (e.g. rights).

Contact

Josh Kubasta
Archive Manager
Minnesota Public Radio
archive@mpr.org

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PBCore: Coming Into Its Own?

By on December 3, 2010

I was worried that a session on ‘metadata’ at the Open Video Conference would not attract many participants, especially toward the end of a long day.    But we had a full house at our PBCore session  – a room crowded with more than 40 people who were there explicitly to hear about metadata,  PBCore in particular.

Linda Tadic gave an excellent overview of how metadata organizes information in order to catalog objects, and Dave Rice followed with specific examples of use cases for groups using PBCore, like WNYC Radio Archives, 25 years of Fresh Air programs at WHYY, and the Dance Heritage Collection collaborative catalog. Then Chris Beer spoke about PBCore update activities and the website.

Much of the material was technical and descriptive, very concrete for video users. But it seemed to be just what the attendees were looking for – they took copious notes, and even though the workshop was scheduled near the end of a long day, no one left – everyone stayed until the session was over, and many followed us into the hallway asking questions and wanting more.

Needless to say, it was quite exciting to have a disparate group of web producers and videophiles eager to learn about something as geeky as metadata.   We were very surprised, but totally gratified.

A few weeks later at the AMIA conference in Philadelphia, there were several sessions on metadata and PBCore, also full. Now I would expect that a gathering of moving image archivists should be interested in metadata, but this year it was more than casual – it was one of the central themes, and during the entire week there was continuous conversation about PBCore and other descriptive metadata standards.

It struck me that the light bulb has finally gone off — not just archivists, but video producers and television and radio broadcasters are finally realizing the importance of S & M (standards and metadata!) and that good metadata is a MUST for log-term access to their digital productions.

And they have discovered PBCore as both a useful and a usable tool to describe and help manage their precious creations.   All the more reason to finalize the improvements in the schema and create new training aids, to keep up the forward momentum.

Nan Rubin

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Upcoming PBCore Presentations!

By on September 20, 2010

Learn more about PBCore and 2.0 development at the following conferences:

Open Video, October 1-2, New York City
An Introduction to PBCore 2.0: Metadata for Public Broadcasters
PBCore has served the Public Media community as a metadata schema for describing media since 2005. With a new round of funding from the Corporation for Public Broadcasting, WGBH Boston is working on PBCore 2.0 – an updated version which will increase its flexibility as a schema and therefore its applicability to diverse user scenarios. In addition, a new web site with updated documentation is set to launch. Come learn about PBCore: how it is evolving, how it is applied, and how it can benefit your workflow and interoperability as a video content producer or consumer.

IASA/AMIA, Nov 2-6, Philadelphia
Coming Attraction: PBCore 2.0
There are a number of metadata standards being used by the library and archival community. However few are adequate, and easy for describing media collections. PBCore is a metadata standard that was developed specifically to describe media. Many in the moving image archival community have begun to utilize the standard. After 2 years of a development hiatus, a new initiative has launched to continue development of the standard to bring it to PBCore 2.0. This session will give an overview of PBCore – why it is a good standard to use for media collections and the work to date to bring it to PBCore 2.0. It will demo and tour the new redesigned PBCore.org website highlighting changes, navigation, and the community input features. And finally there will be several use cases showing practical use of PBCore in real archive projects. The end will be a roundtable discussion to get more feedback from the AMIA/IASA community and take questions.

In addition, join the listserv to stay current on PBCore.

Finally, send us feedback about this site! We are still in the process of re-designing… what do you think? Comment here or help us out by answering our survey about metadata sites.

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Final PBCore 2.0 Change Requests

By on September 20, 2010

Here is the final PBCore 2.0 changes document, which builds on the iterative work to define the PBCore requirements that’s been shared in previous postings here. With the PBCore 1.3 requirements addressing American Archive’s needs, version 2.0 addresses additional requirements for American Archive and includes changes culled from the recent public change request process.

Final PBCore 2.0 Change Request Report (XLS)

The same information is sorted and organized in several different layouts:

  • The 1st sheet are the changes for the schema, which consolidates similar requests that can be viewed in different layouts on the 2nd and 3rd sheets
  • The 2nd sheet represents the change requests by requestor
  • The 3rd sheet shows the change requests by type

This is the roadmap that will be used to develop 2.0. Stay tuned here for further developments and join the conversation!

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2.0 Change Requests Aggregated

By on August 17, 2010

Attached is an Excel sheet aggregating the change requests gathered for PBCore 2.0 development. The three sheets represent three different modes of gathering requests (online, in conversation, etc.)

PBCore_2.0_Changes_100726.xls

We had a lot of repeat requests which is encouraging and has help us focus in on a few key changes needed for PBCore 2.0:

  1. Collections – how to bundle or wrap multiple PBCore records into a collection or feed
  3. Episodes/Chapters/Segmentation – how to use PBCore to represent complex records
  4. Multiple Carriers – how to express one work across multiple carriers (e.g. one program that spans three tapes)
  5. People and affiliations – how to increase PBCore’s capacity to store structured “people” data
  6. Controlled vocabularies – many are outdated and need review. Also support linked data protocols by allowing references to UIDs or URLs.
  7. Rights – how to make use of PBCore’s extension capabilities to express more complex rights metadata

Many of these issues point to the fact that PBCore 1.2 and 1.3 have not been fully documented on this site and new examples are needed.

We hope to remedy this and include 2.0 documentation as we continue to re-vamp the site this fall. If you have any comments or suggestions on how to address the issues outlined here or in the spreadsheet, please pass them along! Comment on this post or email pbcoreinfo@wgbh.org.

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PBCore version 1.3

By on August 2, 2010

Progress on PBCore!

Here’s the version 1.3 XSD and documentation, which is an interim release to focus primarily on supporting upcoming American Archive projects.

PBCore v1.3:

Many thanks to those who submitted change requests for version 2.0. We’ll keep you posted as work continues to finalize the 2.0 requirements and pbcore.org redesign.

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Change Requests so far… Submit yours!

By on July 9, 2010

We are still gathering change requests for PBCore 2.0, to be published in November, 2010. Any requests submitted by July 25, 2010 will be considered for PBCore 2.0. Requests submitted after July 25th will be recorded for the next version of PBCore.

Change requests collected thus far are attached to this post as an Excel file. We will be adding more requests as we receive them. Please submit yours, comment on other requests, and add your voice to the PBCore 2.0 process!

PBCore_2.0_Changes_7.9.10.xls
PBCoreChangeRequests100723.xls

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Progress Report… PBCore 1.3 for August, 2.0 in the Fall

By on July 6, 2010

As previously posted, CPB has hired WGBH, Digital Dawn and AVPS to further the development of PBCore. As an interim step towards PBCore 2.0, and to accomodate PBCore’s use in CPB’s American Archive Project, we are working on version 1.3, due out at the end of July.

Attached to this post you’ll find a document that we’re working from as we consider changes to PBCore. It’s a grid which includes Digital Dawn’s requirements for changes to PBCore in the first column, and WGBH’s plan to address the changes in either 1.3 or 2.0 in the remaining columns. We’ve also incorporated comments from Dave Rice at AVPS – thanks Dave!

Many of the changes have to do with documentation and best practice examples… more so than schema changes. If you have an example best practice or suggestions for documentation clarity please pass them on to the WGBH team by commenting here on the PBCore blog or via our contact form! In addition, keep your change requests for 2.0 coming! We’ll be posting more about requests received so far in the coming days – requests submitted by July 25th will be considered for PBCore 2.0 (due to be published in early November).

PBCoreRequirementsGrid (PDF)

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Deadline Extended: Submit your Change Requests for PBCore 2.0 by July 25th!

By on April 9, 2010

CPB has funded the development of PBCore version 2.0 to be released in the fall, 2010.

We are formally collecting user feedback and requests for changes to PBCore through June 30th, 2010July 25th. Requests submitted after that time may be considered at a future date.

Please submit a separate form for each request and keep in mind that more complete forms will be given more consideration.

Questions? Email the PBCore 2.0 Team.

Thank you!

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