Frequently Asked Questions (FAQs)
- Are all historical digitized resources available in the NLM Digital Collections?
- What type of software was used to build the Digital Collections?
- Do the resources have permanent URLs?
- Are the resources copyrighted?
- Do I need to download any plug-ins to view the resources?
The NLM Digital Collections repository was built using software developed by NLM, open source software, and commercial plug-ins for the front-end access and back-end storage. The software includes:
- Fedora Commons Repository Software
- Blacklight, a "front-end" for Fedora, developed by the University of Virginia Library
- Northwestern University Book Viewer, part of the Northwestern Books project
- NLM Video Player developed by NLM's Office of Computer and Communications Systems (OCCS)
- Los Alamos National Laboratory's djatoka JPEG2000 Server
See Development of a Digital Repository for NLM Digitized Collections and Born-Digital Resources for additional information on the development of functional requirements and the selection of digital repository software for this project.
Every resource has a permanent URL which includes the NLM Unique Identifier (NLM UID). The base of the permanent URL is "http://resource.nlm.nih.gov/" and the NLM UI is appended to the end of the URL. For example, the link for the video "Dental health (1945)" is http://resource.nlm.nih.gov/101306230. The permanent URLs will always redirect to the URL of the object's Resource Record page.
All content in Digital Collections is in the public domain and therefore freely available to view using the built-in Book Viewer and Video Player. Additional information about copyright and fair use of NLM materials is available at NLM Copyright Information and Patron Guide to Copyright and Historical Materials.
You must download and install the Adobe® Reader and Adobe®Flash Player to view resources online. The Adobe Reader allows you to view the PDF documents. The Adobe Flash Player is used to view the Book Viewer and Video Player.