# Documents sheet **URL:** \ **Category:** Define.xml\ **Created:** [November 25, 2019, 11:26am UTC](https://forum.certara.com/t/documents-sheet/1453 "2019-11-25T11:26:27Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Jozef](https://avatars.discourse-cdn.com/v4/letter/j/f4b2a3/32.png) [@Jozef](https://forum.certara.com/u/Jozef)\ **Post date:** [November 25, 2019, 4:15pm UTC](https://forum.certara.com/t/documents-sheet/1453/1 "2019-11-25T16:15:38Z")
Are the documents in the same folder as the define.xml itself? It the casing of the file name identical? Define-XML, like any XML, is “case sensitive”! If all of that is OK, you can use an XML-Editor, a modern Define-XML editor, or just NotePad++ to check whether the “xlink:href” value is “def:DocumentRef/def:leaf” is correct. ---
**Author:** ![Sergiy](https://sea1.discourse-cdn.com/certara/user_avatar/forum.certara.com/sergiy/32/2553_2.png) [@Sergiy](https://forum.certara.com/u/Sergiy)\ **Post date:** [November 25, 2019, 6:29pm UTC](https://forum.certara.com/t/documents-sheet/1453/2 "2019-11-25T18:29:52Z")
Hi Siddhartha, The Validator is looking for presence of “acrf.pdf” and “csdrg.pdf” files in the same folder as your define.xml file as specified. I assume that you do not have them yet, when you are still working on preparation of your define.xml. Kind Regards, Sergiy ---
**Author:** ![siddhartha.vemula](https://avatars.discourse-cdn.com/v4/letter/s/ed8c4c/32.png) [@siddhartha.vemula](https://forum.certara.com/u/siddhartha.vemula)\ **Post date:** [November 25, 2019, 11:26am UTC](https://forum.certara.com/t/documents-sheet/1453/3 "2019-11-25T11:26:27Z")
How to insert the referenced documents like acrf.pdf and csdrg.pdf in the Documents sheet. ![define1.png](https://us1.discourse-cdn.com/certara/original/1X/773ec7ab7082452e3b89b837e19a77342d8eea4f.png) I giving the above documents but I am getting the below error in the Pinnacle 3.0.2 ![Define_0.png](https://us1.discourse-cdn.com/certara/original/1X/04312343be9977485ab146e68a4d0e0f0cfb08b0.png)