Most systems offer a choice to search for exact word matches or substrings.
- This is not just a feature, but also a lack of stemming and stripping
algorithms that would do this automatically.
- The user must provide parts of words in order to find all matches.
For instance, only "absor" will match "absorb" and "absorpt".
- Exact word match is useful when a word has a different meaning than
another word of which it is a substring, e.g. "fact" and "factor".
- Often, one wishes to provide a substring which is the beginning of a
longer word. Unfortunately, many search engines do not offer the possibility
to search for substrings which must be the beginning of a word.
