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16 lines
1 KiB
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16 lines
1 KiB
Text
A data domain is a description of a set of values, either scalar or structured
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(arrays or hashes). The description can include many constraints, like minimal
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or maximal values, regular expressions, required fields, forbidden fields, and
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also contextual dependencies. From that description, one can then invoke the
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domain's inspect method to check if a given value belongs to it or not. In case
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of mismatch, a structured set of error messages is returned.
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The motivation for writing this package was to be able to express in a compact
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way some possibly complex constraints about structured data. Typically the data
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is a Perl tree (nested hashrefs or arrayrefs) that may come from XML, JSON, from
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a database through DBIx::DataModel, or from postprocessing an HTML form through
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CGI::Expand. Data::Domain is a kind of tree parser on that structure, with some
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facilities for dealing with dependencies within the structure, and with several
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options to finely tune the error messages returned to the user.
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WWW: https://metacpan.org/release/Data-Domain
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