Some search engines can locate words "near" each other in the document.
- Proximity search requires the index-database to contain exact or
approximate position info for each occurrence of a word in a document.
- Word order may be important, but cannot be enforced in many
search engines.
- Words that are near each other but in different structural parts
may not be a good match. (One may be at the end of a section and the
other at the beginning of the next section.)
- The definition of proximity is often not made explicit to the user
and cannot be user-defined in any of the popular search engines.
