Searching

Searching is possible at www.clas-digital.uni-frankfurt.de/search. Basic search results use a combination of text bodies (OCRs, if available), titles and author names. All search results are sorted by relevance, most relevant first. Search results may include books which have not yet been scanned, where a preview is not possible, and only the title or author match. By default pages of ten results at a time, with:

• Author + Title, with a link to the scanned pages and OCR of the book (if available)
• Bibliography, with links to further details about the book,
• A preview snippet presenting a first look into the text and in which context the searched words occur.

Advanced search options

Advanced search allows restricting to a specific author, date of publication, and fuzzy search. Advanced options can be reset by performing a brand new search or by clicking on “Search”. Advanced search options are:

• Author
  • Only show books by an author(s) with a particular name.
• Collections
  • Collections are curated sets of books by research subject area.
  • By default all books in collections are searched.
  • The drop-down-menu allows selecting a single collection; for example “Forschung Clas” or “Geschichte des Tierwissens”
• Year of publication
  • By default all books are searched (ie. between 1700 and 2049).
  • Individual links to 1700s, 1800s, are selectable with the drop-down, or an exact range can be entered manually, eg. 1730–1750.
• Show everything
  • By default all results are shown; including books with, and books without scanned page images or OCR texts.
  • It is possible to restrict results to other scanned books with full-text search; to allow additional research within the full texts available via the CLAS-digital book search.
• Exact/Fuzzy Matching
  • Basic search is restricted to exact partial matches: a search for “Hund” will match “Jagdhund”, but “Philofophie” will not match “Philosophie”. Basic search will attempt to match singular/plural and case variations in German-language texts.
  • Fuzzy search will show partial word matches or similiar spelling (using Levenhstein distance). These fuzzy search results may take longer to display.

Typeahead suggestions ignore any selected advanced options. This can result in a typehead suggestion showing, but the search itself returnng zero results. Reset the advanced search options to show more results.

More than 10 results per page

By default 10 search results are shown at a time; this can be increased by selecting a larger number of results per page.

• Results per page
  1. Results of 10, 20, 50 results per page can be selected with the drop-down menu.
  2. Manually editing the URL allows any combination of results to be shown; eg. start=100 and limit=42 will show 42 results per page, starting from result 100 onwards.
• Sorting

  Choices to order search results by relevance (default), alphabetically using surname of author, or chronologically by year.

Searching for several words

By entering eg. “Nachtigall+Gesang” or “Nachtigall Gesang” multiple word or phrases can be searched for at once. Snippets preview results are only shown where all words occurs on the same page.