I'm developing a DBMS that should be able to connect to IBM DB2 via the DRDA protocol. I found a DRDA reference manual that mentions DRDA Implementation Programmer's Guide, SC21-9529 as a publication about DRDA, and seems that this manual is exactly what I was looking for. The problem is, I am unable to find it on the net.Where can I obtain this document or another comparable document that explains implementing DRDA?
Where can I obtain the specification for Distributed Relational Database Architecture?
db2;ibm;dbms
The Distributed Relational Database Architecture (DRDA) Version 5 standard  is available online as a free PDF download from The Open Group's Publications Catalog.  It comprises 3 volumes:C112 DRDA V5 Vol. 1: Distributed Relational Database Architecture(806 pages)https://www2.opengroup.org/ogsys/jsp/publications/PublicationDetails.jsp?publicationid=12360C113 DRDA V5 Vol. 2: Formatted Data Object Content Architecture (110pages)https://www2.opengroup.org/ogsys/jsp/publications/PublicationDetails.jsp?publicationid=12361C114 DRDA V5 Vol. 3: Distributed Data Management Architecture (1176pages)https://www2.opengroup.org/ogsys/jsp/publications/PublicationDetails.jsp?publicationid=12362The current version (as of this writing) was published in August 2011.  It supersedes DRDA v4 (C066, C067, C068) published in April 2007, which in turn superseded DRDA V3 (C043, C044, C045) published in January 2004.