====== GetSha256 ========
Forms a hash value that helps to compare the previous document.


==== Syntax: ====

<code>GetSha256(XPathNodeIterator,NumSubLevels[Optional])</code>

{{:images:sign_warning.png?nolink|}}**Note:** The second optional parameter determines the depth. Possible values are:
  - Default Value = -1 (All is hashed)
  - Value > 0 (number of sub levels)


==== Examples: =====

=== 1. hashen the header only ===

<code>GetSha256(/TradeItems, 0)</code>

{{:transformation:mappings:funktionen:diffmappingfunktionen:getsha256_header.png?nolink|}}


=== 2nd header + position hash ===

<code>GetSha256(/TradeItems, 1)</code>

{{:transformation:mappings:funktionen:diffmappingfunktionen:getsha256_header_and_position.png?nolink|}}