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Kovid Goyal 2021-04-11 13:33:04 +05:30
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@ -420,7 +420,7 @@ Searching for ``no`` or ``unchecked`` will find all books with ``No`` in the col
Hierarchical items (e.g. A.B.C) use an extended syntax to match initial parts of the hierarchy. This is done by adding a period between the exact match indicator (=) and the text. For example, the query ``tags:=.A`` will find the tags `A` and `A.B`, but will not find the tags `AA` or `AA.B`. The query ``tags:=.A.B`` will find the tags `A.B` and `A.B.C`, but not the tag `A`.
Identifiers (e.g., ISBN, doi, lccn etc) also use an extended syntax. First, note that an identifier has the form ``type:value``, as in ``isbn:123456789``. The extended syntax permits you to specify independently which type and value to search for. Both the type and the value parts of the query can use `equality`, `contains`, or `regular expression` matches. Examples:
Identifiers (e.g., ISBN, DOI, LCCN, etc.) also use an extended syntax. First, note that an identifier has the form ``type:value``, as in ``isbn:123456789``. The extended syntax permits you to specify independently which type and value to search for. Both the type and the value parts of the query can use `equality`, `contains`, or `regular expression` matches. Examples:
* ``identifiers:true`` will find books with any identifier.
* ``identifiers:false`` will find books with no identifier.