  We present a machine-readable movement writing for sleight-of-hand moves with
cards -- a "Labanotation of card magic." This scheme of movement writing
contains 440 categories of motion, and appears to taxonomize all card sleights
that have appeared in over 1500 publications. The movement writing is
axiomatized in $\mathcal{SROIQ}$(D) Description Logic, and collected formally
as an Ontology of Card Sleights, a computational ontology that extends the
Basic Formal Ontology and the Information Artifact Ontology. The Ontology of
Card Sleights is implemented in OWL DL, a Description Logic fragment of the Web
Ontology Language. While ontologies have historically been used to classify at
a less granular level, the algorithmic nature of card tricks allows us to
transcribe a performer's actions step by step. We conclude by discussing design
criteria we have used to ensure the ontology can be accessed and modified with
a simple click-and-drag interface. This may allow database searches and
performance transcriptions by users with card magic knowledge, but no ontology
background.
