Always type these operators capitalized. Finally, you can choose what part of the database to use and how the fields shall be combined. However, bear in mind that too narrow querys may be resultless. A search string will be detected if it is part of any word in the corresponding field in the database. For instance, the search string form in the abstract field will detect publications having for instance the words form ing , per form ed , and per form ance in their abstract.
Searches using the abstract field is subject for a warning.
We have not yet added abstracts in our database except for a few publications. The search is case insensitive. It is also accent insensitive to some extent.