1 :Info: mrds.gi: mrds:  1980-05-14  mrds
 2 
 3 Function: This is a brief description of the Multics Relational Data
 4 Store (MRDS) which is a generalized database manager based on the
 5 relational approach.
 6 
 7 
 8 Introduction: MRDS provides capabilities to create, load, and access
 9 a relational database with a query language that is relationally
10 complete.
11 
12 It has an associated end user facility LINUS, Logical Inquiry and
13 Update System that provides an interface for less computer oriented
14 users.
15 
16 MRDS provides both a Multics command level interface, and a
17 subroutine level interface that is callable from all Multics
18 programming languages supporting a call interface.
19 
20 
21 The databases supported by MRDS provide a large measure of data
22 independence, and control of concurrent accesses to the database.
23 Security and database recovery are also provided for.  The database
24 concepts of views, and database snapshots are part of the makeup of
25 MRDS.
26 
27 
28 List of references:
29    There are two Multics manuals that contain the majority
30    of the information pertinent to MRDS.
31 Multics Relational Data Store Reference Manual, order number AW53
32 Logical Inquiry and Update System Reference Manual, order number AZ49
33 
34 
35 An Introduction to Data Base Systems
36    by C. J. Date, 2nd edition, Reading, Mass. published by
37    Addison Wesley in 1977.  This is a good work on databases in
38    general.
39 
40 Relational Data Base Systems
41    by Won Kim, that appeared in ACM Computing Surveys Vol. 11,
42    No. 3, Sept. 1979, pp. 185-211.  An update on this article,
43    involving MRDS, appeared in ACM Computing Surveys Vol. 12, No. 1,
44    March 1980, pp 111-113.  This is a more specific description of
45    relational databases.
46 
47 
48 Other help:  To find other info segments pertaining to mrds, type the
49 command:  list_help mrds
50 
51 
52 :hcom:
53 /****^  HISTORY COMMENTS:
54   1) change(2020-12-15,GDixon), approve(2021-02-22,MCR10088),
55      audit(2021-05-27,Swenson), install(2021-05-27,MR12.6g-0056):
56       A) Fix errors found by the new verify_info command.
57                                                    END HISTORY COMMENTS */