Tips for Searching by Text

The following table presents a number of tips for specifying text search criterion expressions. Please note that you may enter your search criterion expressions in either uppercase or lowercase letters. References to the specified text in Trends articles will be found regardless of their case.


Please note that when a search criterion expression includes both Boolean operators “AND” and “OR”, parentheses must be used to establish the order in which the expression components are evaluated. Parentheses must also be used when the expression includes the Boolean operator “NOT” followed by a phrase containing “AND” or “OR”. Expression segments in parentheses are evaluated before the rest of the search criterion expression. Omitting the parentheses will likely result in the omission of desired reports from the search results.


Additional Tips for Searching by Text
Please be aware of the following search features:

  • You cannot search for the words “AND”,“OR”, and “NOT” because these words are seen as Boolean operators.
  • You cannot search for the word “NEAR” because this word is seen as a proximity operator.
  • You cannot search for prepositions, articles, single digits, or other words on the following “noise word” list, because such words are ignored.
    about
    after
    all
    also
    an
    and
    another
    any
    are
    as
    at
    be
    because
    been
    before
    being
    between
    both
    but
    by
    came
    can
    come
    could
    did
    do
    each
    or
    from
    get
    got
    had
    has
    he
    have
    her
    here
    him
    himself
    his
    how
    if
    in
    into
    is
    it
    like
    make
    many
    me
    might
    more
    most
    much
    must
    my
    never
    now
    of
    on
    only
    or
    other
    our
    out
    over
    said
    same
    see
    should
    since
    some
    still
    such
    take
    than
    that
    the
    their
    them
    then
    there
    these
    they
    this
    those
    through
    to
    too
    under
    up
    very
    was
    way
    we
    well
    were
    what
    where
    which
    while
    who
    with
    would
    you
    your
    a b c d e f
    g h i j k l
    m n o p q
    r s t u v w
    x y z
    $
    1 2 3 4 5
    6 7 8 9 0

    Thus the following expressions are evaluated identically:

    • treatment of breast cancer
    • treatment breast cancer
    When "noise words" are included in search phrases, they act as placeholders for any ignored word(s). 
    For example, the expression “treatment of breast cancer” would match text strings “treatment for breast cancer” and “treatment and breast cancer”.
  • Punctuation marks such as the period (.), colon (:), semicolon (;), and comma (,) are treated as word breaks and are otherwise ignored during a search.
  • To search for a word or phrase that includes a special character such as an ampersand (&), pound sign (#), dollar sign ($) or parentheses (), you must enclose the word or phrase in quotation marks.
  • To search for a word or phrase that contains quotation marks, you must double the quotation marks where they appear in the word or phrase, then enclose the word or phrase in quotation marks. For example, “””bridge”” technology” will match the following phrase: “bridge” technology.



[Home]    [About]    [Help]    [Site Map]
Copyright © 2014 ECRI
All rights reserved
www.ecri.org