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Frequently Asked Questions

  • What is the Theological Commons?

    The Theological Commons is a digital library of 78,924 books and periodicals on theology and religion, including 29,322 volumes from the Princeton Theological Seminary Library.

    Princeton Theological Seminary is developing the Theological Commons in partnership with the Internet Archive, a nonprofit organization dedicated to building and maintaining a free and openly accessible online digital library. Princeton Theological Seminary shares in the vision and mission of building a digital library freely accessible to scholars, pastors, and other readers around the globe.


  • How does Princeton Seminary select material for inclusion in the Theological Commons?

    Selection of materials for inclusion in the Theological Commons is guided by the Library’s Collection Development Policy. Additionally, due to legal restrictions on copyrighted works, the Theological Commons only includes materials that are out of copyright, or for which special permission has been obtained from the copyright holder. Typically, works published before 1923 are unambiguously out of copyright, and such works constitute the vast majority of content in the Theological Commons.


  • What should I do if I cannot find an item in the Theological Commons?

    If you cannot find an item you are looking for, there may be several reasons for its absence. The item may yet be under copyright or it may fall outside the scope of the Library’s Collection Development Policy. It may also not yet have been digitized or brought into the Theological Commons. Contact us to nominate materials for inclusion.


  • What subjects are represented in the Theological Commons?

    The Theological Commons draws broadly from the fields of religion and theological studies, along with relevant material from ancillary disciplines.


  • What institutions have contributed digital resources to the Theological Commons?

    The Theological Commons includes books scanned at libraries and cultural institutions both nationally and internationally. The largest percentage of works in the Theological Commons has been contributed by the Princeton Theological Seminary Library.


  • For some books, the “Search within this book” option and “Send to Kindle” button are unavailable. Why?

    Generating a searchable digital text for a physical book requires running the digital images of the printed pages through Optical Character Recognition (OCR) software. Currently, no OCR software produces 100% accuracy in character recognition. Text files produced through OCR vary in error rate due to factors such as the physical condition, typeface, page layout, and language of the original book.

    Due to the varying accuracy of computer-generated text, to ensure a good experience for the reader we limit the availability of the digital text to books with an estimated error rate of less than 20%, and we make this estimate known in the interest of full disclosure. (Click the “Send to Kindle” button, when available, to see that book’s estimated OCR error rate.)


  • When I download a PDF file and copy it to my e-book reader, the e-book reader says the document cannot be displayed. Why?

    E-book readers such as Kindle (excluding Kindle Fire) are designed to display files containing digital text, not digital images of physical pages from a printed book. While most PDF files on the internet do contain text (along with formatting information and illustrations), the PDF files in Theological Commons do not contain text; instead, they contain digital images of the printed pages from a physical book. Many e-book readers cannot display such PDF files.

    By contrast, devices such as iPad and Kindle Fire are full-fledged tablet computers, not strictly e-book readers, and therefore those devices can display the PDF files from Theological Commons.


  • How do I cite materials found in the Theological Commons?

    Please use the following form for citation of materials found in the Theological Commons:

    Example:

    Schaff, Philip. Christ in Song: Hymns of Immanuel. New York: Anson D.F. Randolph, 1868. Digital Presentation in the Theological Commons, http://commons.ptsem.edu/