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altmetric / identifiers

Collection of utilities related to the extraction, validation and normalization of various scholarly identifiers.
https://rubygems.org/gems/identifiers
MIT License
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Support ISBNs separated with spaces #6

Closed mudge closed 7 years ago

mudge commented 7 years ago

As ISBNs can officially 0 be separated with spaces as well as hyphens, support the extraction of identifiers with spaces. Note that we are now stricter about removing hyphens so that it is only done between digits or an X check digit.