JPS59116851A - Information retrieval system with limitation in use - Google Patents

Abstract

PURPOSE:To simplify a necessary device and processing by converting a key code in an active state into a key code in an inactive state prior to retrieval by a user and excluding the key code from an objective of retrieval during the retrieval. CONSTITUTION:A user identification code is inputted from a user identification code storage register IDR to the address generating circuit ADG' of a key code conversion part K-CONV through an input terminal t4. The circuit ADG' checks whether there is a key code that is not permitted to use an identification code. If it is found, the code is sent out as address data AD from an output terminal t1 to a memory MEM through an OR gate OG. The memory MEM read a key code K2 from the corresponding address and sends it as data RD from the input terminal t2 of the key code conversion part K-CONV. Then, the data is inputted to a converting circuit CON1 through a changeover switch SW2 to switch the key code K2 from the active state to the inactive state. Then, the key code is written as write data WD in the address of the key code K2 of the MEM through the changeover switch SW1.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention provides a limited information retrieval method (for JJ), and more particularly, a method for providing information to users using a table consisting of a unit of information group identified by a key code. depending on 1
This invention relates to an information retrieval method with usage restrictions when the number of copies is restricted.

Prior Art and Problems When a table consisting of units of information groups identified by key codes is stored in memory, and the use of the table is restricted to some users, the conventional method is as shown in Fig. 1. Information retrieval methods were known.

In Figure 1, MEM is a memory, C is a collation unit, and CHE
KR is a determination unit, KR is a key code storage register, IDR is a register that stores a user's identification code ID, and 1 is an input key device for inputting a key code, user identification code ID, etc.

In the memory MEN, key codes Kl, K2 to Kn are set for each address area of a fixed size, and the key codes 1. In the above address area corresponding to 2 to Kn, that is, for each key code, , K2 to Kn
In the address area following, the key code Kl, 2 to Kn
The unit of information group identified by IU1. l1lz-
IUn is stored. 1 for each key code. 2~
Kn has additional information TAG, , TAG, ~
TAGn is added.

In the matching section C, ADG is an address generation circuit, and COM
P is a comparison circuit.

By inputting a key code (Kl, one of K2 to Kn) from the user, the unit of information group identified by the key code input by the user, for example, the key code! When the information of the unit IU1 of the information group is allowed to be used for the information group, the information of the unit of the information group is read out from the memory MEN and made available to the user. When use (3) is not permitted, the information is not read and cannot be used.

Next, the operation will be explained with reference to FIG. The user uses 1- Search 1 for the key code that identifies the unit of the desired information group.
゛Input from the input key device IK as the 8th information, and also use the input key device IK.
Enter the identification code ID of one person. User identification code ID
can be entered by pressing the keys on the input key device IK, but it can also be entered by inserting a user identification card into the input device (not shown) and reading a magnetically recorded code. .

The input key code Km is temporarily stored in the key code storage register KR. Input user identification code I
D is stored in the user identification code register ID.

When the key code and user identification code are input as described above, the collation unit C starts operating, and first, an address of 0 is generated from the address generation circuit AI)G to the first key code. is stored in the memory H as address data (AD).
A reading (4) instruction is also given to the memory HEM, so that the first key code 1 and the additional information TAG1 are read as read data RD, and one input part of the comparator COMP. Enter. User identification code storage register IDE
is 11 at the output terminal 01 when the user identification code is stored.
”, and therefore the AND gate AG is used exclusively, so the contents of the user identification code storage register IDH are input to the other input section of the comparison circuit COMP, and the contents of the comparison circuit COMP are input from the user. The contents of the key code storage register KR are compared with the key code just read from the memory MEN.

If they do not match, the coincidence signal (CI) is "0#" indicating a mismatch, and this is given to the address generation circuit ADG, which assigns α to the address of 1 to the key code just sent out (α of 2 to the adjacent key code). Create address 2 to the key code by adding the address difference) and add the address data AD.
The message is sent to the memory MEN as a message, and an instruction to remove the bladder is given.

In the same manner as above, 2 is read in the key code, a comparison is made in the comparator circuit COMP, and if there is a mismatch, the above operation is repeated, and the key code 2~ is read in sequence with the contents of the key code storage register. A search is then performed.

Now, in the ratio circuit COMP, if it is detected that the contents of the key code storage register KR (fJ) and the key code read from the memory MEN match, the match signal (cr) becomes "1" indicating a match. becomes.

Address generation circuit ADG receives this number 41 and temporarily suspends its operation.

The determination unit CITK also receives the coincidence signal (CI) "1" and reads out the key code (f-) and its additional information @TAGm from the memory MEN, and also the user identification code storage register IDH. A logical operation is performed here to determine that the user is allowed to use the unit IUm of the information group identified by the key code Km. When the judgment signal S
"1" is output as .

The address generation (b) path ADO resumes its operation upon receiving this output "1#," and sends the output of the address of the key code Km that has already been created and sent out to +1 from the +α circuit.
The controller switches to the circuit, obtains address data that increases sequentially by 1, sequentially reads the information of the unit IUm of the information group identified by the key code Km one by one, and sends it out as read data (RD). On the other hand, because the determination signal S is ``1#'' and the AGI is passed through four times, the information read as the read data (RD) is sequentially output to the output terminal 02.

Further, when the determination unit CHE determines that the user is not allowed to use the unit of the information group, "0#" is output as the determination signal S.

As a result of receiving this output "0#," the address generation circuit ADG does not resume operation.

This output "0" is given to the terminal 02, and since it is non-conductive, no output is generated at the output terminal 02.

As described above, the conventional technology determines whether or not the use of the unit of information group identified by the key code input by the user is permitted, by inputting additional information in one key code (7). This is done by performing complex logical calculations between the key code, additional information, and user identification code that are added and stored in memory and read.

Therefore, it is not only necessary to add extra additional information (rAa! ~), but also a complex judgment logic is required to determine whether or not a unit of information group is eligible for use. The disadvantage was that the processing was complicated.

OBJECTS OF THE INVENTION The present invention eliminates the above-mentioned drawbacks of the prior art and provides a method for information retrieval in cases where some users are restricted from using a table consisting of units of information groups identified by key codes. , the purpose is to simplify the necessary equipment and processing.

Examples of the invention Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a block diagram showing connections in one embodiment of the present invention. In Figure 2, MEN is a memory, C is a collation unit, and K
-CONV is a key code conversion unit, KR is a key code storage register, IDR is a register for storing user identification (8) code ID, and IK is a register for inputting key code and user identification code ID, etc. The input key devices, AG and OG, are an AND gate and an OR gate, respectively.

The memory MEN has a similar structure to the memory IJ HEM of FIG. In the memory MEN, 1. is assigned to the key code for each address area of a certain size. , ~Kn is set for the key code, , K, and the address area corresponding to ~Kn, that is, for each key code, , K,
In the address area following the address where Ktzz to Kn are stored, the unit of information group IU1 . IU2 to IUn are stored. Unlike Figure 1, the key code is 1. No additional information is added to 2 to Kn. 1 + K*~ for key code
Assume that the address for storing Kn is such that the address of a certain key code Kp is always larger than the address of the previous key code KP-1 by a constant number α. Therefore, the unit of information group IUp- identified by the key code KP-1
1 has α pieces of information that can be accessed by α addresses.

The user inputs from the input key device IK a key code that identifies the unit of the information group that he or she wishes to use, and also inputs the user's identification code ID. The user identification code II) may be entered by pressing a key on the input key device IK, but an ID card with the user identification code II) magnetically recorded may be prepared and this ID card inserted into the input key device IK. (not shown)
This can also be done by inserting it into a computer, reading it magnetically, inputting it, etc.

When a certain user inputs a key code and user identification code that identifies a desired unit of information group, the user is permitted to use the unit of information group identified by the key code. If so, the information in the unit of the information group is read out and used, but if it is not permitted, reading is prohibited.

Next, the operation of the embodiment shown in FIG. 2 will be explained.

A key that identifies the units IUl, IU, ~IUn of the information group.
1 in the code, Km~Kn is expressed as a combination of hexadecimal numbers, and each number is encoded with an ISO code.Active state (Kla, Kla~Kna) is encoded with a binary code. When the inactive state (Kln, f
Indicated by μ, Knn. ). Here, hexadecimal numbers are 0 to 9. means A-F, for example I as a key code
Taking DF as an example, each number composing this key code corresponds to the rso code in the active state, and I is 00.
110001, D is [11[10D10[1, F is [1
It is represented by 8 bits of 1[1[1[111D, and the key code IDF is 0011[10(11,[1
1000100,01000110. The key code is a two-round code in the inactive state, and I is 0001.
, D is represented by 4 bits of 11[11, F is 1111, and the key code IDF is [+[+[+
[+, [lO[1[1, [1000,0001,11[
11, 1111.

The memory MEM contains all key codes K 1 +
K2~Ks is the key code Klα in the active state.
.

%a is stored in K2a~, and in addition to searching,
It is assumed that a key code in an active state is input from the input key device IK for retrieval, and the key code in an active state is stored in the key code storage register KR.

Now, in FIG. 2, when the user identification code ID is stored in the register IDR and the key code for search is stored in the key code storage register KR, the key code converter -CONV is activated.

The key code conversion unit -CONV has the configuration shown in FIG. 6, and C0N1 converts the key code from an active state to an inactive state format, and CON2 similarly converts a key code from an inactive state to an active state format. The circuits SF, , SF are interlocked changeover switches, and ADG' is an address generation circuit. When -CONV is generated (111+) in the key/code converter, the user identification code stored there is sent to the user identification code storage register IDE as shown in FIG. -Input to the address generation circuit Ana' (see No. 3 and 1) of -CONV in the code conversion section. The address generation circuit ADG' interprets the identification code,
If the user of the identification code is not allowed to use the
Check whether the code exists, and if so, create an address where the sales key code is stored, and output terminal 11.
The data is selected as address data (AD) and a read instruction is issued. The above address data is sent to the memory MEN via (12) OR gate OG.

Through the above operation, the memo IJ MEN receives the address and reading instruction of one key code (for example, 22), so it reads 2 from that address to the key code and sends it as read data (RD). do.

The key code converter -CONV receives the key code as read data (RD) from the memory HEM at the input terminal t2, inputs it to the conversion circuit CON via the changeover switch SF2, and converts the key code into 2. is converted from its active state 2α to its inactive state 2n, and the write data (W
As D), a write instruction is sent to the memory MEN, and a 1 is written to the address 2 of the original key code sent from the address generation circuit ADG'.

In this way, the key code identifying the unit of the unaccounted for information group used by the user mentioned above is memorandum IJ M
It is converted to an inactive state in EN.

If there are more units of the most important information group to be used, the same process is performed after the above process is completed to convert the corresponding key code to an inactive state.

As described above, the key code that identifies the unit of the uncounted information group that the user uses is memo IJ MEN
When all the keys are changed to the inactive state, the collation unit 075E is activated, and the address generation circuit ADG generates an address of 1 in the first key code, and outputs the OR as address data (j4D).・A read instruction is given to the memory HEM through the gate ON, and a read instruction is given to the memory HEM, so 1 is assigned to the first key code.
The data is read as read data (RD) of the EM, inputted to the comparison circuit C0HF of the verification section C, and compared with the key code stored in the key code storage register KR.

If they do not match, the match signal (cr) is "0#" indicating a mismatch, and this is given to the address generation circuit ADG, which adds α to the address of 1 to the first key code just sent. 2 to the second key code
Create and send an address, and send an M removal instruction.

In the same way as above, from the memory MEN to the key code!
are read and compared in the comparison circuit COMP. If they do not match, the above operation is repeated and the sixth and subsequent key codes are sequentially compared.

But now, for example, on the second key code! When a match is detected when comparing the contents of the 1 key code storage register KR, the match signal (cr) becomes "1" indicating a match. Address generation circuit ADG receives this signal and switches its operation. In other words, from +α circuit that increases the address output by α, +1 that increases address output by 1
The circuit is switched to sequentially read the information in the unit IUz of the information group identified by 2 in the key code in address order so as to generate addresses that are sequentially increased by 1.

At this time, due to the coincidence signal (CI) '1', the AND gates AG are all in one color, so that the unit IU of the information group identified by the key code 2, which is sequentially read out as described above, is The information inside is read data (J?J)
), it is output to the output terminal Out through AND gate AG (15).

In the above search, if the comparison circuit COMP does not detect a match, the information in the memo IJ HEM will be output to 0r.
It does not output to bt.

In Fig. 2, for a certain user, the use of information of a specific unit of information group IU identified by a key code by 2 is calculated in -CONV by the key code converter from its identification code. If it is determined that the key is not stored in the memo IJ MEN, as described above,
Since the code 2 is converted from the active state to the inactive state, even if the user specifies 2 as the key code and the key code is stored in the key code storage register KR, In the comparison circuit COMP, the same key
Although it is a code, one is in an active state and the other is in an inactive state, so a match cannot be detected, and the key code 2 is excluded from the search target, and the key 4 code is 2.
It is not possible to use the information of the unit IU2 of the information group identified by .

As mentioned above, the unit IU, , IU, ~I of the Yu/axis group
The rjn information (16) is made unusable by deactivating the key code that identifies the unit of the information group.

It is assumed that the input key device IK sends out RSO code information in response to input information.

As described above, when the verification is completed and this is detected, for example by the user pulling out the user identification card, the inactive key code is returned to the active state in the memo IJ HEM.

That is, in the key code converter -CONV,
The changeover switches SWI and SFt are switched, and the address generation circuit ADG' performs the same process as described above to determine the user's identification code based on the user's identification code input from the user identification code storage register IDE via the input terminal t4. generates an address of a key code that is not counted for , reads out the key code in the inactive state as read data (RD) using this address, and outputs the key code to the input terminal t2.
and a circuit C for converting the key code from the inactive state to the active state form via the switched switch SW2.
The data is input to ON, is converted to an active state, is sent to the memory MEH as read data (rD) via the switched switch SF, and is written to the above address.

Through this process, all the key codes in the memory MEN that were in an inactive state are returned to an active state.

In this way, the device returns to its resting state and is ready for the next use.

However, if the same user wants to perform a search again with a different key code, for example, before the user pulls out the user identification code card, On the other hand, if you enter a new key code while the previously stored key code is still inactive, a new memory ME will be created.
A search using the N key code is immediately performed without the need to replace the N key code. In this way, the time required to search for ~ number of key codes by the same user is reduced.

The present invention is not limited to the embodiments described above, and various modifications can be made within the technical scope thereof.

Effects of the Invention Since the present invention is configured as described above, when some users partially restrict the use of a table composed of units of information groups identified by key codes,
Unlike conventional technology, there is no need to add extra additional information to the unit of the information group, especially the key code that identifies the unit, and the unit of the information group identified by the key code input by the user Complex determination logic and determination processing for determining whether or not the use has been tfued by the user are no longer necessary, and search time is shortened when searching for multiple key codes by the same user. effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the connection configuration of an information retrieval method according to the prior art, FIG. 2 is a block diagram showing the connection configuration of an embodiment of the present invention, and FIG. 6 is a key code of the embodiment of FIG. 2. FIG. 2 is a block diagram showing an example of a configuration of -CONV in a conversion unit. (19) MEM...Memory, C...Verification section, K-CONV.
...Key code change section, KR...Key code storage register, IDE...User identification code storage register,
IK...input key device, AG...and gate,
oG...or gate, KI + K2~niru...
Key code, IUl, 1112~IUn...Unit of information group, coN! ...Circuit that converts the key code from the active state to the inactive state format, coN2... Converts the key code from the inactive state to the active state format 1s+l@a/1! ? Applicant Fujitsu Ltd. Representative Patent Attorney Hisashi Tamamushi Gobe (3 others) (20)

Claims (1)

[Claims] An information retrieval method in which a table consisting of units of information group identified by a key code is stored in memory, and the user is restricted from using some of the units of the information group when using the Cheagle. , the above key code is composed of a combination of hexadecimal numbers (D~9~Ap),
Converts the active key code obtained by encoding each of the hexadecimal numbers that make up the key code using an ISO code into the inactive key code obtained by encoding each of the above hexadecimal numbers using a binary code. The key code in the active state is stored in the memory as a key code for searching the table, and the key code in the active state is used to perform a search. The key code of the unit of the information group is converted into an inactive key code in the memory by the conversion circuit before the search performed by the user. , an information retrieval method with usage restrictions characterized in that the key code is excluded from the search target.