@dtoo Observation number in the workfile associated with a date string.

@ispanel Is the current workfile page panel structured.

@obsrange Number of observations in the workfile page .

@obssmpl Number of observations in the workfile sample.

@otod Workfile observation to date string.

@otods Sample observation to date string.

@pagecount Number of pages in workfile.

@pageexist Does a page exist in the workfile.

@pagefreq Frequency specification for the workfile page .

@pageids Workfile page observation identifiers.

@pageidx Index vector of the specified observations.

@pagelist List of pages in workfile.

@pagename Name of active workfile page.

@pagerange Range specification of active workfile page.

@pagesmpl Sample specification in active workfile page.

@pagesmplidx Index vector of observations in the current sample.