Modelling Disparate Computer Systems (with xrdb)
From: Neo <neo55592_at_hotmail.com>
Date: 9 May 2005 15:10:29 -0700
Message-ID: <1115676629.888914.215560_at_o13g2000cwo.googlegroups.com>
This example models 10 computer systems, each quite different than the other. A portion of the script to create and select the first system is shown below. Once entered, a user can view the details of each systems by simply expanding tree nodes instead of having to perform joins. See www.xrdb.com/example/ex123.asp for details. Would someone be willing to model 10 or a 100 such systems in a traditional db to highlight their advantages?
& it has (CREATE device inst *
)
(SELECT computer inst * & * has (* has (* serial# VR3736))) Received on Tue May 10 2005 - 00:10:29 CEST
Date: 9 May 2005 15:10:29 -0700
Message-ID: <1115676629.888914.215560_at_o13g2000cwo.googlegroups.com>
This example models 10 computer systems, each quite different than the other. A portion of the script to create and select the first system is shown below. Once entered, a user can view the details of each systems by simply expanding tree nodes instead of having to perform joins. See www.xrdb.com/example/ex123.asp for details. Would someone be willing to model 10 or a 100 such systems in a traditional db to highlight their advantages?
// Create a system that has a computer and speakers. // The computer has a 20 GB IDE hard drive, // and a 133 Mhz motherboard with dual 2.0 GHz processors. // The motherboard has 3 slots, // the first with 2/10 MBit network card, // the second with audio card with 3 sampling rates. // The third slot is empty. // The 7.1 speaker system outputs 97 decibel per watt // and can handle 1000 watts peak. // See below script for additional specs.(CREATE system inst *"system 1"
& it has (CREATE device inst *
& computer inst it
& deskTop inst it
& it mfg +dell
& it model# +"optiplex gx100"
& it serial# +DM6867A87
& it has (CREATE device inst *
& "hard drive" inst it
& it mfg +ibm
& it "drive type" +ide
& it capacity (CREATE spec inst *
& it qty +20
& it unit +gb)
& it "buffer size" (CREATE spec inst *
& it qty +2
& it unit +mb)
& it "rotational speed" (CREATE spec inst *
& it qty +10000
& it unit +rpm)
& it "seek time" (CREATE spec inst *
& it qty +10
& it unit +ms)
)
& it has (CREATE device inst *
& motherboard inst it
& it serial# +HG45U37Q
& it "bus speed" (CREATE spec inst *
& it qty +166
& it unit +mhz)
& it has (CREATE device inst *
& cpu inst it
& it mfg +intel
& it "cpu type" +pentium
& it serial# +VWR3786
& it "clock rate" (CREATE spec inst *
& it qty +2
& it unit +ghz)
)
& it has (CREATE device inst *
& cpu inst it
& it "cpu type" +pentium
& it serial# +VR3736
& it "clock rate" (spec inst *
& * qty 2
& * unit ghz)
)
& it has (CREATE slot inst *
& it position# +1st
& it "slot type" +pci
& it has (CREATE device inst *
& "network adapter" inst it
& it mfg +smc
& it serial# +Y683047
& it "transfer rate"
(CREATE spec inst *
& it qty +2
& it unit +mbit)
& it "transfer rate"
(CREATE spec inst *
& it qty +10
& it unit +mbit)
)
)
& it has (CREATE slot inst *
& it position# +2nd
& it "slot type" +pci
& it has (CREATE device inst *
& "audio adapter" inst it
& it mfg +"creative labs"
& it model# +SB6887i
& it "sampling rate"
(CREATE spec inst *
& it qty +22
& it unit +khz)
& it "sampling rate"
(CREATE spec inst *
& it qty +44
& it unit +khz)
& it "sampling rate"
(CREATE spec inst *
& it qty +88
& it unit +khz)
)
)
& it has (CREATE slot inst *
& it position# +3rd
& it "slot type" +scsi)
)
)
& it has (CREATE device inst *
& "speaker system" inst it
& it "speaker system type" +7.1
& it efficiency (CREATE spec inst *
& it qty +97
& it unit +db/watt)
& it "continuous power" (CREATE spec inst *
& it qty +200
& it unit +watt)
& it "peak power" (CREATE spec inst *
& it qty +1000
& it unit +watt)
)
)
// Find computer that has a mother board // which has a cpu whose serial# is VR3736. // Finds computer in system 1.
(SELECT computer inst * & * has (* has (* serial# VR3736))) Received on Tue May 10 2005 - 00:10:29 CEST