York Digital Library – Images Case Study Julie Allinson, SUETr Multimedia Deposits Event 30 th March 2009

Overview A walk-through of what we did at York, bearing in mind starting from scratch we use ‘F’-for-flexible Fedora and Mura front-end short-term needs and long-term plans not just an image library

A walk-through of what we did at York,

bearing in mind

starting from scratch

we use ‘F’-for-flexible Fedora

and Mura front-end

short-term needs and long-term plans

not just an image library

Approach Image Content Model a statement of requirements a record of decisions a design blueprint [not yet] a machine-readable ‘content model’ re-usable possibly of wider use? https://vle.york.ac.uk/bbcswebdav/xid-316149_3

Image Content Model

a statement of requirements

a record of decisions

a design blueprint

[not yet] a machine-readable ‘content model’

re-usable

possibly of wider use?

https://vle.york.ac.uk/bbcswebdav/xid-316149_3

Considerations Use case(s) Image types Uniqueness (preservation/access) Metadata for intended and potential usage File formats, sizes, expected delivery mechanism Access Restrictions Deposit Workflow Rights

Use case(s)

Image types

Uniqueness (preservation/access)

Metadata for intended and potential usage

File formats, sizes, expected delivery mechanism

Access Restrictions

Deposit Workflow

Rights

Use Case(s) The University of York History of Art Department need digital images for teaching and research. They have no networked way of sharing image resources. They use a lot of scanned images under CLA, which need access control. They also sometimes take images and in the past got slides made of these.

The University of York History of Art Department need digital images for teaching and research. They have no networked way of sharing image resources. They use a lot of scanned images under CLA, which need access control. They also sometimes take images and in the past got slides made of these.

But, other types of image too … Works of art Architecture or architectural features Archaeological sites, objects Archival materials Computer-generated images Photographs taken for specific purposes

Works of art

Architecture or architectural features

Archaeological sites, objects

Archival materials

Computer-generated images

Photographs taken for specific purposes

Metadata Requirements Model based on VRA – image & work distinction Profile of VRA, minimal extensions Vocabularies IDs and Labels Mapping to DC

Requirements

Model

based on VRA – image & work distinction

Profile

of VRA, minimal extensions

Vocabularies

IDs and Labels

Mapping to DC

Datastreams/files Image formats accept all Preferred: open formats Convert to: JPEG/TIFF for delivery Images ‘expressions’ stored ARCHIVAL_IMAGE; FULL_IMAGE; PREVIEW_IMAGE; THUMBNAIL File sizes and resolutions maintain original size/resolution - guidelines available [soon]

Image formats

accept all

Preferred: open formats

Convert to: JPEG/TIFF for delivery

Images ‘expressions’ stored

ARCHIVAL_IMAGE; FULL_IMAGE; PREVIEW_IMAGE; THUMBNAIL

File sizes and resolutions

maintain original size/resolution - guidelines available [soon]

Relationships Important in Fedora – RELS-EXT Currently stores collection membership Can be exploited further, e.g. to store relationships between different objects, formal content model Exploring RELS-INT for internal relationships

Important in Fedora – RELS-EXT

Currently stores collection membership

Can be exploited further, e.g. to store relationships between different objects, formal content model

Exploring RELS-INT for internal relationships

Workflow Specification of the deposit process Currently fairly simple Uses mapped drives (local deposit) muradora xforms Has user-facing and technical aspect Review and publish stage

Specification of the deposit process

Currently fairly simple

Uses

mapped drives (local deposit)

muradora

xforms

Has user-facing and technical aspect

Review and publish stage

Workflow – human Select object type Select collection Drop + select file Describe Save Review – record + data dictionary Publish

Select object type

Select collection

Drop + select file

Describe

Save

Review – record + data dictionary

Publish

Access Control Requirements for access control Two main current use cases Restricted CLA Restricted public This needs Integration with LDAP/Shibboleth Access control filter to ‘talk’ to different systems Roles and role mapping RELS-INT datastream

Requirements for access control

Two main current use cases

Restricted CLA

Restricted public

This needs

Integration with LDAP/Shibboleth

Access control filter to ‘talk’ to different systems

Roles and role mapping

RELS-INT datastream

Rights Copyright clearance info built into VRA Standard rights statements – CLA & Creative Commons built into VRA Image license for accepting collections Uses Creative Commons

Copyright clearance info built into VRA

Standard rights statements – CLA & Creative Commons built into VRA

Image license for accepting collections

Uses Creative Commons

It’s all a work in progress To-do JHOVE for technical metadata Refining/extending workflow Access control Different types of images etc. etc.

To-do

JHOVE for technical metadata

Refining/extending workflow

Access control

Different types of images

etc. etc.

Usefulness of ‘Content Model’ ‘ checklist’ m ight be too internal to be of wider use w hether documented or not, each aspect of the process has be thought through (with Fedora anyhow) a document helps demonstrate all the work involved n eeds regular review to keep up-to-date

‘ checklist’

m ight be too internal to be of wider use

w hether documented or not, each aspect of the process has be thought through (with Fedora anyhow)

a document helps demonstrate all the work involved

n eeds regular review to keep up-to-date

Experience with images Good starting point one dimensional lots of work/advice tools and code available lots of content available relatively small file sizes easy to demonstrate

Good starting point

one dimensional

lots of work/advice

tools and code available

lots of content available

relatively small file sizes

easy to demonstrate

That’s it contact [email_address]

contact [email_address]