Can someone algorithmically explain this TSQL UDF with XML?

Can someone please provide an algorithmic description of what this TSQL UDF is doing? I am not familiar with XML for TSQL.

FUNCTION [Common].[XmlArrayOfInt]

(@Xml AS XML (Common.ArrayOfIntegersSchema))

RETURNS @Result TABLE (Value INT NOT NULL)

AS

BEGIN
      INSERT INTO @Result(Value)
      SELECT T.c.value('.','int') AS Value
      FROM @Xml.nodes('/ArrayOfInt/int') AS T(c)
      RETURN
END

Also are value and nodes built-in TSQL functions? And what is '/ArrayOfInt/int'?

Thanks!