Extract thumbnail from openxml office files

[Hong-Thai Nguyen]

Hi all,
I want to extract thumbnail image included in Open XML office files. 
Apparently, we can do it by openxml4j: 
http://openxmldeveloper.org/blog/b/openxmldeveloper/archive/2006/11/21/openxmlandjava.aspx
The question is : should we integrate thumbnail in default metadata list of 
ooxml parsing result ?


Thanks

Hong-Thai