1 the OpenIsis database at a glance
6 - highly flexible data structure:
7 potentially unlimited number of data fields ("columns") in record
8 - highly efficient storage:
9 unused data fields consume no space
10 - natural modelling - ultra fast access:
11 logically related data that would be artificially separated in
12 a relational DB is stored in a single record
13 - highly flexible index structure:
14 index entries associated with a record are under full application control,
15 can even be derived from associated text documents of any format.
20 - Z39.2 (IIF) based data structure
21 record structure corresponds to ANSI Z39.2
22 (ISO 2709, "Information Interchange Format")
23 - Z39.50 based retrieval
24 the query language resembles Z39.50 "Type-1" queries as used by
25 all major libraries (known from WAIS and most search engines).
26 - all bibliographic data models
27 like MAB and the various MARC standards can be represented in IIF
30 is canonically mapped to IIF for highly efficient storage and retrieval
35 - variety of programming languages
36 Java, Perl, Tcl, PHP, C-library for all compiler languages
38 using Java, Perl or PHP as wanted
39 - graphical user interface
40 for Windows and Unix (incl. Mac OS X) based on Tk
41 - usage in-process or as server
43 server planned using indexdata's Yaz
48 benchmarks on an 800MHz Pentium III with standard IDE disk
54 write access with no index entries
56 write access with ten index entries per record
61 There is a choice between traditional and 21st century database formats.
62 - size of data field and record
63 traditional: 32KB, 21st: no limit
64 - number of records and database size
65 traditional: 16 million records of 500 MB total size, 21st: no limit.
66 logical database can span several physical databases (virtually no limit).
68 traditional: ~1 TB, 21st: 32 TB per physical index.
69 logical index can span several physical indexes (virtually no limit).