MoveUp Method

Description:

Moves the Current Data Element up one level. This is only applicable if the Current Data Element is positioned within an SQ Data Element or within an Item Data Element..

If the Current Data Element is positioned anywhere in an SQ, the Current Data Element ascends to the SQ. If within an Item, the new Current DE should become the Item DE. Only one level is ascended per call.

If the Current DE is at the top level (0), no action is taken.

If this method is successful the CurrentLevel increments by one. Zero refers to the top level. As the number gets larger the Data Element is deeper into the hierarchy. Data Elements (as well as SQs and Item Delimiters) are always stored in odd-numbered levels; even-numbered levels contain Items and SQ Delimiters.

Syntax:

      MoveUp()

Return Value:

N/A

Bits Per Pixel:

N/A

Sample:

Med