If your needs are simple, e.g. config files, then YAML::Tiny may be sufficient. Here's how they compare:
YAML -- the "official" standard, implemented in pure Perl, but very "heavy" due to the flexibility it offers
YAML::Syck -- XS implementation using the libsyck library; fastest
YAML::Tiny -- a pretty full subset of YAML in less than 100 lines of pure Perl
-xdg
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