The
allow to indicate in which order the query must be processed, or to limit
the impact of the ‘NOT’ operator.
Example
1 : if you enter the query:
‘invoice
AND (estimate OR contract)’.
Text’O’Mat
finds the documents (in grey):
either
containing all at once the term ‘invoice’ and the term ‘estimate’,
or containing at once the term ‘invoice’ and the term ‘contract’.
Documents
|
Words
contained in the document
|
Document 1
|
Estimate
|
Document 2
|
Invoice
Estimate
|
Document 3
|
Invoice
|
Document 4
|
Contract
Estimate
|
Document 5
|
Estimate
Invoice
|
Document 6
|
Contract
|
Example
2 : if you type the following query:
‘(invoice
AND estimate) OR contract’
Text’O’Mat
finds the greysed documents containing:
either
the term ‘invoice’ and the term ‘estimate’, without necessarily
contain the term ‘contract’,
or the term ‘contract’.
Documents
|
Words
contained in the document
|
Document 1
|
Estimate
|
Document 2
|
Invoice
Estimate
|
Document 3
|
Invoice
|
Document 4
|
Contract
Estimate
|
Document 5
|
Estimate
Invoice
|
Document 6
|
Contract
|
Example
3 : if your enter the query:
‘(invoice
NOT estimate) OR contract’
Text’O’Mat
retrieves all the documents (greysed) containing:
either
the term ‘invoice’, without containing the term ‘estimate’,
or the term ‘contract’ and eventually the term ‘estimate’.
Documents
|
Words
contained in the document
|
Document 1
|
Estimate
|
Document 2
|
Invoice
Estimate
|
Document 3
|
Invoice
|
Document 4
|
Contract
Estimate
|
Document 5
|
Estimate
Invoice
|
Document 6
|
Contract
|
Copyright
© 2000 C2V (Computers, Communications & Visions).
|