1. NLM Digital Repository The Search for a New Book viewer
Washington D.C. Area Fedora User Group
May 15, 2018
NLM Digital Repository The Search for a New Book viewer
Lindsay Franz
Yanru Bi

2. Current book viewer Latest release/beta: April 6, 2009 HTML4
Product end of life
Uses Flash (for image manipulation)
Non-responsive
Not 508 compliant

3. Refresh aging Northwestern University page turner implemented in our original Muradora/Fedora release (used disseminators!)
Reduce technical debt / stay ahead of security team
Enhance user experience with responsive design and new accessibility features
Open source software preference
Low implementation level-of-effort
Working Group Charge

4. Features in all 3 applications
We compared 3 tools:
Internet Archive, Universal Viewer, and Mirador
Keyword Searchable (results highlighted on page)
Variety of page views (actual size, fit to page, full screen, view cover, single page mode)
View book covers
Single page mode
Supports right-to-left reading order
Display/link to external descriptive metadata
Next/Previous Page Navigation
Responsive design
Information conveyed without use of color
Correct/consistent reading order of controls and navigation elements
Navigate structural contents(table of contents view, structural metadata, logical page numbers)
Embeddable in other applications
Features in all 3 applications

5. INTERNET ARCHIVE Scroll pages No Flash component No frames components
Highlights keyword search results on page
Display OCR/text (alongside page image or separately)
INTERNET ARCHIVE

6. Gracefully handles differing internal page sizes, image orientation, and foldouts
Zoom in and out, pan, rotate, select viewing area
Go/Jump to page
Downloads (PDF of whole book, OCR for whole book, Single page image, All page images)
No Flash component
Key control navigation
Print capabilities
Multiple language support for user interface
UNIVERSAL VIEWER

7. MIRADOR Scroll Pages Annotate image block areas
Ability to adjust contrast; reverse Image polarity
Works well with Universal Viewer (similar technical aspects)
MIRADOR

8. And the winner is…! Universal Viewer #1; Internet Archive #1a
Scoring matrix ranked features and implementation criteria for each application
Universal Viewer more forward-looking, but more complex to implement, requires more changes to other parts of the architecture
Internet Archive had a shorter implementation path / quick fix
Interesting to note that several exemplar IIIF implementations provide both Universal Viewer and Mirador
When asked why, general response was it was just as easy technically to offer/support both – default is U but let users decide which tool best suits their needs and track analytics over time
And the winner is…!

9. Internet Archive VS Universal Viewer
No architecture changes
Minor code changes
Missing some basic features
Search, mobile navigation as plugin
Architecture changes
Many basic and advanced features
IIIF manifest

10. Current Book Viewer data flow
Internet Archive DATA Flow
Solr
Search
Server
Lucene
Index
Search
query
results
Fedora
Metadata
(MySQL)
File locations
Fedora
File
Storage
TIFF Master
JPG Master
DMDINDEX
METS
PDF
JPEG2000
JPG Thumb
OCR
ALTO
RELS-EXT
FOXML
Book
Viewer
Fedora
Repository
DMDINDEX, PDF, OCR
JPG Thumbs, RELS-EXT
JPEG
2000
Djatoka
Image Server
Dynamic JPGs
Different sizes, tiles

11. IA CUSTOMIZATIONS Search Download PDF/OCR/Metadata
Point search server to our Solr
Regenerate JSON on the fly
Download PDF/OCR/Metadata
Image rotation, full screen mode
Upgrade from JQuery to 3.x
508 compliant
IA CUSTOMIZATIONS

12. Solr Search Results VS IA Search Results

13. Current Book Viewer data flow Universal Viewer/Mirador data flow
Solr
Search
Server
Lucene
Index
Search
query
results
Fedora
Metadata
(MySQL)
File locations
Fedora
File
Storage
TIFF Master
JPG Master
DMDINDEX
METS
PDF
JPEG2000
JPG Thumb
OCR
ALTO
RELS-EXT
FOXML
Book
Viewer
IIIF
Server
Fedora
Repository
DMDINDEX, PDF, OCR
JPG Thumbs, RELS-EXT
IIIF Image API
IIIF Search API
IIIF Presentation API
JPEG
2000
Djatoka
Image Server
Dynamic JPGs
Different sizes, tiles

14. FUTURE WORK Re-index page and word dimension
Reform JSON to support word highlighting
Generate IIIF manifest
FUTURE WORK