Entering your search term(s)
- Any number of search terms can be used
- If you enter more than one search term choose the “AND” option to
search for cards which include all of these terms, or “OR” to search for
cards which include any of these terms
- Phrase searching
is not available, so it is not necessary to place quotation marks around
- If you tick the Truncate
option the search will look for your search term and its variant endings,
eg history and historical for ‘histor’. If you use Truncate, the similarity
Too many hits, or hits are not accurate enough?
make your search more accurate or precise, you could:
- Use more than one search term with the “AND” option
For instance, a
search for ‘Wight’ produces lots of results, many not relevant, but if you
search ‘Isle Wight’ the results are more accurate.
- Adjust the similarity (fuzziness) of your search upwards (see
- Use the Browse option instead.
Too few hits, or not finding something expected?
more hits, you could:
- Use more than one search term with the “OR” option
You can use this as a
way of searching for synonyms or variant spelling.
- Use the Truncate option.
- Adjust the similarity (fuzziness) of your search downwards (see
This may make it to possible to find a
difficult to read card that the Optical Character Recognition (OCR) had
Adjusting the similarity (fuzziness) of your search
or fuzziness of a search can be adjusted by changing the similarity. Currently
it is set to a default value of 90% but you can change this with the following
- 100% - is the most precise search. Because of the way the fuzzy search
works using a higher value may exclude items which have the correct term
on the card but the OCR has interpreted it incorrectly.
- 90% - is the default setting.
- 80% - is less precise and may find extra relevant
cards which have had your terms mis-read by the optical character
- 50% - is the lowest setting and is likely to give large numbers of cards which
are not relevant.
About Optical Character Recognition (OCR)
The full text search has been enabled by a
process called optical character recognition which looks at the groups of
characters on the card image and converts the data into something that can be
The fuzzy search means that even if the characters have not been
correctly recognised the system can interpret the data and give you some
(If a whole book is being scanned the optical
character recognition can be adjusted to allow for inconsistencies in the
typeface e.g. an indistinct character, because it will occur throughout the
document. Because our cards were typed and produced on many machines and by
several methods this "learning" part of the OCR process cannot be
The optical character recognition does not always
recognise a word or term but the fuzzy search will display all near matches.