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Recoll stores all internal data in Unicode UTF-8 format, and it can index
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Recoll stores all internal data in Unicode UTF-8 format, and it can index
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files with different character sets, encodings, and languages into the
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files with different character sets, encodings, and languages into the
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same index. It has input filters for many document types.
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same index. It has input filters for many document types.
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Stemming depends on the document language. Recoll stores the unstemmed
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Stemming is the process by which Recoll reduces words to their radicals so
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versions of terms and uses auxiliary databases for term expansion. It can
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that searching does not depend, for example, on a word being singular or
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switch stemming languages, or add a language, without re-indexing. Storing
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plural (floor, floors), or on a verb tense (flooring, floored). Because
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the mechanisms used for stemming depend on the specific grammatical rules
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for each language, there is a separate stemmer module for most common
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languages where stemming makes sense. Storing documents written in
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documents in different languages in the same index is possible, and useful
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different languages in the same index is possible, and commonly done. In
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in practice, but does introduce possibilities of confusion. Recoll
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this situation, you can specify several stemming languages for the index.
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currently makes no attempt at automatic language recognition.
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Recoll stores the unstemmed versions of terms in the main index and uses
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auxiliary databases for term expansion (one for each stemming language),
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which means that you can switch stemming languages between searches, or
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add a language without needing a full reindex. Recoll currently makes no
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attempt at automatic language recognition, which means that the stemmer
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will sometimes be applied to terms from other languages with potentially
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strange results. In practise, even if this introduces possibilities of
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confusion, this approach has been proven quite useful, and, awaiting the
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addition of an automatic language recognition module to Recoll, it is much
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less cumbersome than separating your documents according to what language
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they are written in.
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Recoll has many parameters which define exactly what to index, and how to
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Recoll has many parameters which define exactly what to index, and how to
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classify and decode the source documents. These are kept in configuration
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classify and decode the source documents. These are kept in configuration
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files. A default configuration is copied into a standard location (usually
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files. A default configuration is copied into a standard location (usually
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something like /usr/[local/]share/recoll/examples) during installation.
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something like /usr/[local/]share/recoll/examples) during installation.
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The default parameters from this file may be overridden by values that you
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The default values set by the configuration files in this directory may be
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set inside your personal configuration, found by default in the .recoll
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overridden by values that you set inside your personal configuration,
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sub-directory of your home directory. The default configuration will index
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found by default in the .recoll sub-directory of your home directory. The
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your home directory with default parameters and should be sufficient for
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default configuration will index your home directory with default
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giving Recoll a try, but you may want to adjust it later, which can be
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parameters and should be sufficient for giving Recoll a try, but you may
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done either by editing the text files or by using configuration menus in
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want to adjust it later, which can be done either by editing the text
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the recoll GUI
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files or by using configuration menus in the recoll GUI
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Indexing is started automatically the first time you execute the recoll
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Indexing is started automatically the first time you execute the recoll
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search graphical user interface, or by executing the recollindex command.
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search graphical user interface, or by executing the recollindex command.
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Searches are usually performed inside the recoll graphical user interface
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Searches are usually performed inside the recoll graphical user interface
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