View source for Heap storage format

[[Front Panel]] and [[Block diagram]] of a [[VI|VI file]] are internally called Heaps. Across versions of [[LabVIEW]], several storage formats were used for these heaps.

The format used in currently opened ''VI file'' can be selected in [[Ned options]]. The format used in new ''VI files'' depends on the version of LabVIEW.

'''Note:''' Changing the Heap Storage format in Ned may cause your VI to no longer open! Make sure to experiment on scrap copies of files.

== Binary format 1 ==

Used in first versions of LabVIEW. Has ''Resource ID'' of ''FPHP'' and ''BDHP''.

== Binary format 2 ==

First update of the format, prepared to handle separation of [[Type descriptor|Type Descriptors]] from heap data. Has ''Resource ID'' of ''FPHb'' and ''BDHb''.

== Binary format 3 ==

After this update, all data stored within heap was separated from the main heap tree, dividing heap into two blocks: structure and data. Has ''Resource ID'' of ''FPHc'' and ''BDHc''.

== Verbose Tagged Text ==

A text based format, created bo be easily readable by humans.

== XML format ==

Since the structure of the heap fits XML format perfectly, would be a sin not to add such option.

[[Category:LabVIEW internals]]