urn:ddi:int.naddi:696eb59f-7e14-4f4d-81ef-f14d952d6f27:1 int.naddi 696eb59f-7e14-4f4d-81ef-f14d952d6f27 1 wed_intro_ddi_comment urn:ddi:int.naddi:2d079568-f89f-451e-b012-bfa5dda1cb8e:1 int.naddi 2d079568-f89f-451e-b012-bfa5dda1cb8e 1 wed_intro_ddi_comment Comments on Introduction to DDI