Instead of (or parallel to) searching in the particular fields
(title, author, publication date, keywords) you may also chose to
search the ERPA
full text database.
The input is one or more words or (a) group(s) of letters and the
operators and signs
- Allowed characters are a-z, A-Z, 0-9,
" " (space, blank), "-"
(minus), "." (period) and ":"
(colon); as well as the special characters listed
- Note: If the input consists of more than one word or
group of letters and includes neither an operator (OR, AND, NOT) nor
brackets nor inverted commas, the search-engine sets by default an "OR"
inbetween the words.
search-engine allows you to formulate sophisticated search queries in
this input field:
The following operators are allowed:
- means that the word (search string) following this operator has
to be contained in the full text of the paper;
- means that the word (search string) following this operator may
alternatively be contained in the full text of the paper;
- means that the word (search string) following this operator must
not be contained in the full text of the paper.
Further important signs to be used in the
full text search:
- ( )
- standard (round) brackets around an expression relate an operator
to the whole expression within the brackets (Remember your basic
knowledge in maths!);
- " "
- inverted commas are used to embrace a group of words which should
be treated as one expression;
- is the truncation mark for one or more strings (letters or
- is the truncation mark for one and only one string (letter or
See here for more on truncation!
Note: The full text search mode uses stopwords. This means
that words contained in the list
of stopwords are ignored by the search-engine.