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  "Title": "A Filter System for Selecting Trading Instruments",
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  "Description": "Enables filtering datasets of tradable instruments by\nprior specified identifiers which correspond to saved filter\nexpressions. A filter is a named expression bound to a target\ndataset, stored once in a package level registry, and later\napplied to select trading codes such as tickers or symbols out\nof a universe, price or signal dataset. The design follows the\n`filters` package, replacing the clinical study dataset\nconvention with a trading instrument convention.",
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