This is a boolean attribute which controls what is returned by the AST_READ function when it is used to read from an StcsChan. If StcsProps is set non-zero, then a KeyMap containing all the properties read from the STC-S document will be returned by AST_READ. If StcsProps is set to zero (the default), then the properties will not be returned.

StcsChan

• Other attributes such as StcsCoords and StcsArea can be used to specify other Objects to be returned by AST_READ. If more than one of these attributes is set non-zero, then the actual Object returned by AST_READ will be a KeyMap containing the requested Objects. In this case, the properties KeyMap will be stored in the returned KeyMap using the key " PROPS" . If StcsProps is the only attribute to be set non-zero, then the Object returned by AST_READ will be the properties KeyMap itself.

• The KeyMap containing the properties will have entries for one or more of the following keys: " TIME_PROPS" , " SPACE_PROPS" , " SPECTRAL_PROPS" and " REDSHIFT_PROPS" . Each of these entries will be another KeyMap containing the properties of the corresponding STC-S sub-phrase.