Determines if the named data exists in the current PV‑WAVE session.

data_name—A scalar string containing a data name (in the default domain, $GLOBAL) or a 2-element string array containing a domain name and data name.

result—Returns true if the named data exists; returns false otherwise. Also returns false if the data_name is invalid.

To be valid, the data_name input parameter name must begin with a letter. The name is not case-sensitive, and may contain letters, underscores, and numbers.

See the example for DMRestore.

DMCopyData, DMEnumerateData, DMGetData, DMInit, DMRemoveData, DMRenameData, DMRestore, DMStoreData