Wildcards represent unknown characters. They are valid only in
English-language search queries.
The asterisk (*) represents any group of characters, including no character.
The question mark (?) represents any single character.
The dollar sign ($) represents zero or one character.
General Rules about Wildcards
In Topic and Title searches, you must enter at least three characters before
using a wildcard.
Wildcards may be used inside a word. For example, odo$r finds odor and odour.
You cannot use wildcards after special characters (/ @ #) and punctuation (.
, : ; !).
- You cannot search on a wildcard if it appears in a word or name. For
example, the search TS=E*Trade OR TS="E*Trade" will not return
records about this investment company.
Wildcards, Hyphens, and Apostrophes
The search engine treats hyphens (-) and apostrophes (') in names as spaces.
AU=O Brien returns the same number of results as
Try searching for names with and without a space. For example,
AU=OBrien OR AU=O Brien returns both variants
of the name.
When searching for hyphenated query terms, enter the term with and without
wildcards. For example:
TS=hydro-power returns records that contain the terms
hydro-power and hydro power.
TS=hydro*power returns records that contain the terms
hydropower and hydroelectricpower.
TS=hydro power returns records that contain the terms hydro
and power anywhere in the record, such as hydro-power, hydro-electrical power,
and hydro-mechanical power.
Asterisk (*) Examples
Question Mark (?) Example
Dollar Sign ($) Examples