EP0229232A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
File management system
Assignee: Tektronix Inc
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Filing: 1986-10-09
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Granted: —
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Expires: 2006-10-09
Abstract
Abstract A file management system comprises a computerized data storage and retrieval utility for integrating data files produced by independent data processing operations by linking the data files according to user-definable relationships. The machine includes means for assigning user-definable attributes (82) to the data files and their links and for identifying groups of files and links having selected attributes. The machine also maintains an archive (64) of versions of data files and their links referenced according to their creation time. The machine includes provisions for transmitting commands to a computer operating system when selected files are accessed or modified to invoke execution of user created programs.
Inventors
- 👤 Mayer D. Schwartz
- 👤 Norman M. Delisle
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 16:47
CPC Classifications
G; G06; G06F; G06F9/00; G06F9/06; G06F9/46; G06F9/52; G06F16/00; G06F16/10; G06F16/90; G06F16/93
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
65 words
A data file management method comprising the steps of: storing data files in a computer accessed data storage device; relating pairs of said data files according to user-defined values of user-defined relationship attribute parameters; characterizing the content of each of said data files according to user-defined values of user-defined file attribute parameters; and storing records of said values of said relationship and file attribute parameters.
Claim 2
Dependent Claim
65 words
A data file management method comprising the steps of: storing data files in a computer accessed data storage device; relating pairs of said data files according to user-defined values of user-defined relationship attribute parameters; characterizing the content of each of said data files according to user-defined values of user-defined file attribute parameters; and storing records of said values of said relationship and file attribute parameters.
Claim 3
Dependent Claim
30 words
The data file management method according to claim 1 further comprising the step of identifying groups of said data files according to said stored relationship and file attribute parameter values.
Claim 4
Dependent Claim
128 words
A data file storage and retrieval method comprising the steps of: a. storing data files in a computer accessed data storage device; b. storing node records in said computer accessed data storage device, each node record being associated with one of said data files and comprising first data indicating at least one file attribute parameter having a user-defined name, and second data indicating a user-defined value of said at least one file attribute parameter, said file attribute parameter value representing an attribute of the content of the data file associated with said each node record; and c. identifying a first group of said data files wherein the contents of all data files of said first group have a common attribute represented by the values of file attribute parameters.
Claim 5
Dependent Claim
128 words
A data file storage and retrieval method comprising the steps of: a. storing data files in a computer accessed data storage device; b. storing node records in said computer accessed data storage device, each node record being associated with one of said data files and comprising first data indicating at least one file attribute parameter having a user-defined name, and second data indicating a user-defined value of said at least one file attribute parameter, said file attribute parameter value representing an attribute of the content of the data file associated with said each node record; and c. identifying a first group of said data files wherein the contents of all data files of said first group have a common attribute represented by the values of file attribute parameters.
Claim 6
Dependent Claim
134 words
The data file storage and retrieval method according to claim 3 further comprising the steps of: d. storing link records in said computer accessed data storage device, each link record comprising third data indicating a user-selected pair of said data files, fourth data indicating at least one link attribute parameter having a user-defined name, and fifth data indicating a user-defined value of said at least one link attribute parameter, said at least one link attribute parameter value representing an attribute of a relationship between said pair of data files indicated by said third data; and e. identifying a group of said link records each comprising fifth data indicating a common relationship attribute and each comprising third data indicating a pair of data files of said first group of data files identified in step c.
Claim 7
Independent Claim
78 words
A method for identifying related data files stored in a computer accessed data storage device, the method comprising the steps of: storing link data characterizing relationships between pairs of said data files; identifying a first of said data files; and identifying a group of said stored data files wherein each data file of said group in combination with said first stored data file comprise a pair of data files having a common relationship characterized by said link data.
Claim 8
Independent Claim
78 words
A method for identifying related data files stored in a computer accessed data storage device, the method comprising the steps of: storing link data characterizing relationships between pairs of said data files; identifying a first of said data files; and identifying a group of said stored data files wherein each data file of said group in combination with said first stored data file comprise a pair of data files having a common relationship characterized by said link data.
Claim 9
Dependent Claim
57 words
The method of claim 5 further comprising the steps of: storing file attribute data characterizing an attribute of the content of each of the stored data files; and identifying a subgroup of said group of data files wherein the content of each data file of the subgroup has a common attribute according to said file attribute data.
Claim 10
Independent Claim
263 words
A method for locating files stored in a computer accessed data storage device comprising the steps of; storing node records, each node record corresponding to one of said stored data files and comprising first data indicating at least one file attribute parameter, and second data indicating a value of said at least one file attribute parameter, said file attribute parameter value representing an attribute of the content of the data file corresponding to said node record; storing link records, each link record comprising third data identifying a pair of said data files, fourth data indicating at least one link attribute parameter, and fifth data indicating a value of said at least one link attribute parameter, said link attribute parameter value representing an attribute of a relationship between the contents of said pair of data files identified by said third data; obtaining from a user selection data identifying at least one user selected file attribute parameter value, identifying at least one user selected link attribute parameter value, and identifying a user selected one of said stored data files; determining from said link records a first group of said stored data files wherein each data file of said first group is related to said user selected one data file by a relationship attribute indicated by said at least one user selected link attribute parameter value; and determining from said node records a first subgroup of said first group of stored data files wherein the contents of all data files of said first subgroup have a common attribute represented by said user.selected file attribute parameter value.
Claim 11
Independent Claim
263 words
A method for locating files stored in a computer accessed data storage device comprising the steps of; storing node records, each node record corresponding to one of said stored data files and comprising first data indicating at least one file attribute parameter, and second data indicating a value of said at least one file attribute parameter, said file attribute parameter value representing an attribute of the content of the data file corresponding to said node record; storing link records, each link record comprising third data identifying a pair of said data files, fourth data indicating at least one link attribute parameter, and fifth data indicating a value of said at least one link attribute parameter, said link attribute parameter value representing an attribute of a relationship between the contents of said pair of data files identified by said third data; obtaining from a user selection data identifying at least one user selected file attribute parameter value, identifying at least one user selected link attribute parameter value, and identifying a user selected one of said stored data files; determining from said link records a first group of said stored data files wherein each data file of said first group is related to said user selected one data file by a relationship attribute indicated by said at least one user selected link attribute parameter value; and determining from said node records a first subgroup of said first group of stored data files wherein the contents of all data files of said first subgroup have a common attribute represented by said user.selected file attribute parameter value.
Claim 12
Independent Claim
281 words
A method for storing and identifying successive versions of successively changed content of data files stored in.a computer accessed data storage device, the method comprising the steps of: creating and storing a version history record when the content of one of said data files undergoes a change, the version history record comprising a set of instructions for recreating a version of the content of said one data file existing immediately prior to the change by inserting data into and deleting data from the content of said one data file existing immediately following the change, one such version history record being created and stored each time a data file is changed such that a version history record is associated with each successive version of the content of a file; assigning to each version history record a time parameter value established according to the time the file content version associated with the version history record was first stored as the content of a data file; storing node records, each data file and each version history being associated with one of said node records, each said node record comprising first data indicating at least one file attribute parameter and second data indicating a value for said at least one file attribute parameter, said file attribute parameter value representing a file content attribute; and identifying a first group of said node records wherein each record of said first group comprises data indicating a user selected file attribute parameter value and is associated with a version history record having an assigned time parameter value indicating the file content version associated with the version history record was stored in a file as of a user selected time.
Claim 13
Independent Claim
281 words
A method for storing and identifying successive versions of successively changed content of data files stored in.a computer accessed data storage device, the method comprising the steps of: creating and storing a version history record when the content of one of said data files undergoes a change, the version history record comprising a set of instructions for recreating a version of the content of said one data file existing immediately prior to the change by inserting data into and deleting data from the content of said one data file existing immediately following the change, one such version history record being created and stored each time a data file is changed such that a version history record is associated with each successive version of the content of a file; assigning to each version history record a time parameter value established according to the time the file content version associated with the version history record was first stored as the content of a data file; storing node records, each data file and each version history being associated with one of said node records, each said node record comprising first data indicating at least one file attribute parameter and second data indicating a value for said at least one file attribute parameter, said file attribute parameter value representing a file content attribute; and identifying a first group of said node records wherein each record of said first group comprises data indicating a user selected file attribute parameter value and is associated with a version history record having an assigned time parameter value indicating the file content version associated with the version history record was stored in a file as of a user selected time.
Claim 14
Dependent Claim
59 words
The method according to claim 8 further comprising the steps of: changing a value of at least one file attribute parameter indicated by at least one node record from a first value to a second value; and storing a record of said first value including data indicating when said at least one file attribute parameter had said first value.
Claim 15
Dependent Claim
152 words
The method according to claim 8 further comprising the steps of: storing link records, each link record comprising third data identifying a pair of node records according to said time parameter values, fourth data indicating at least one link attribute parameter, and fifth data indicating at least one link attribute parameter value for said at .least one link attribute parameter, said at least one link attribute parameter value representing an attribute of a relationship between a pair of data file content versions associated with a pair of data files; assigning to each link record a time parameter value established according to the time the link record was stored; and identifying a group of said link records wherein each record of said group comprises fifth data indicating a user selected link attribute parameter value and has an assigned time parameter value indicating the link record was stored as of said user selected time.
Claim 16
Dependent Claim
59 words
The method according to claim 10 further comprising the steps of: changing a value of at least one link attribute parameter indicated by at least one link record from a first value to a second value; and storing a record of said first value including data indicating when said at least one link attribute parameter had said first value.
Claim 17
Independent Claim
370 words
A method for storing and identifying successive versions of successively changed content of data files stored in a computer accessed data storage device, the method comprising the steps of: creating and storing a version history record when the content of one of said data files undergoes a change, the version history record comprising a set of instructions ' for recreating a' version of the content of said one data file existing immediately prior to the change by inserting data into and deleting data from the content of said one data file existing immediately after the change, one such version history record being created and stored each time the data file is changed such that a version history record is associated with each successive version of the content of a file; assigning to each version history record a time parameter value established according to the time the file content version associated with the version history record was first stored as the content of a data file; storing node records, each data file and each version history being associated with one of said node records, each said node record comprising first data indicating at least one file attribute parameter and second data indicating a value for said at least one file attribute parameter, said file attribute parameter value representing a file content attribute; storing link records, each link record comprising third data identifying a pair of node records according to said time parameter values, fourth data indicating at least one link attribute parameter, and fifth data indicating a value for said at least one link attribute parameter, said link attribute parameter value representing an attribute of a relationship between a pair of data file content versions associated with a pair of data files; assigning to each link record a time parameter value established according to the time the link record was stored; and identifying a first group of said link records each comprising data indicating that the content of a user selected one of said stored data files as of a user selected time is related to the content of another of said stored data files as of said user selected time and according to a user selected link attribute parameter value.
Claim 18
Independent Claim
370 words
A method for storing and identifying successive versions of successively changed content of data files stored in a computer accessed data storage device, the method comprising the steps of: creating and storing a version history record when the content of one of said data files undergoes a change, the version history record comprising a set of instructions ' for recreating a' version of the content of said one data file existing immediately prior to the change by inserting data into and deleting data from the content of said one data file existing immediately after the change, one such version history record being created and stored each time the data file is changed such that a version history record is associated with each successive version of the content of a file; assigning to each version history record a time parameter value established according to the time the file content version associated with the version history record was first stored as the content of a data file; storing node records, each data file and each version history being associated with one of said node records, each said node record comprising first data indicating at least one file attribute parameter and second data indicating a value for said at least one file attribute parameter, said file attribute parameter value representing a file content attribute; storing link records, each link record comprising third data identifying a pair of node records according to said time parameter values, fourth data indicating at least one link attribute parameter, and fifth data indicating a value for said at least one link attribute parameter, said link attribute parameter value representing an attribute of a relationship between a pair of data file content versions associated with a pair of data files; assigning to each link record a time parameter value established according to the time the link record was stored; and identifying a first group of said link records each comprising data indicating that the content of a user selected one of said stored data files as of a user selected time is related to the content of another of said stored data files as of said user selected time and according to a user selected link attribute parameter value.
Claim 19
Dependent Claim
52 words
The method of claim 12 further comprising the steps of: identifying a group of node records indicated by said first group of link records; and identifying a subgroup of the last mentioned group of node records wherein each record of said subgroup contains data indicating a user selected file attribute parameter value.
Claim 20
Dependent Claim
115 words
. A data management method comprising the steps of: transmitting data files to and retrieving data files from a computer accessed data storage device, said data files being stored therein and retrieved therefrom according to commands provided to a computer operating system adapted to control storage and retrieval of files in said computer accessed data storage device and to run user provided programs; and transmitting a first user-defined character string to the computer operating system whenever at least one of said data files is retrieved, said first user-defined character string comprising an instruction for said computer operating system to initiate execution of a first user provided program stored in said computer accessed data storage device.
Claim 21
Dependent Claim
115 words
. A data management method comprising the steps of: transmitting data files to and retrieving data files from a computer accessed data storage device, said data files being stored therein and retrieved therefrom according to commands provided to a computer operating system adapted to control storage and retrieval of files in said computer accessed data storage device and to run user provided programs; and transmitting a first user-defined character string to the computer operating system whenever at least one of said data files is retrieved, said first user-defined character string comprising an instruction for said computer operating system to initiate execution of a first user provided program stored in said computer accessed data storage device.
Claim 22
Dependent Claim
66 words
The data management method of claim 14 further comprising the step of transmitting a second user-defined character string to the computer operating system whenever the content of at least, one of said data files is changed, said second user-defined character string comprising an instruction for said computer operating system to .initiate execution of a second user-provided program stored in said computer accessed data storage device. ,
Claim 23
Dependent Claim
56 words
' The data management method according to claim 15 further comprising the step of maintaining a record of successive user-defined versions of said first character string, each successive version being identified according to the value of a time parameter, said value being established according to the time said each version was initially defined by a user.
Claim 24
Dependent Claim
66 words
A data file management apparatus comprising: a computer accessed data storage device for storing data files; and means responsive to user input for storing link attribute data relating pairs of said data files according to user-defined values of user-defined relationship attribute parameters, and for storing file attribute data characterizing the content of each of said data files according to user-defined values of user-defined file attribute parameters.
Claim 25
Dependent Claim
66 words
A data file management apparatus comprising: a computer accessed data storage device for storing data files; and means responsive to user input for storing link attribute data relating pairs of said data files according to user-defined values of user-defined relationship attribute parameters, and for storing file attribute data characterizing the content of each of said data files according to user-defined values of user-defined file attribute parameters.
Claim 26
Dependent Claim
34 words
The data file management apparatus according to claim 17 further comprising means for perusing said file attribute data to identify groups of said data files having contents characterized by common file attribute parameter values.
Claim 27
Dependent Claim
136 words
A data file storage and retrieval apparatus comprising: a computer accessed data storage device for storing data files; first means responsive to user input for storing node records in said computer accessed data storage device, each node record being associated with one of said data files and comprising first data indicating at least one file attribute parameter having a user-defined name, and second data indicating a user-defined value of said at least one file attribute parameter, said file attribute parameter value representing an attribute of the conte.nt of the data file associated with. said record; and second means for perusing said node records to identify a first group of said data files wherein the contents of all data files of .said first group have a common attribute represented by the value of a file attribute parameter.
Claim 28
Dependent Claim
136 words
A data file storage and retrieval apparatus comprising: a computer accessed data storage device for storing data files; first means responsive to user input for storing node records in said computer accessed data storage device, each node record being associated with one of said data files and comprising first data indicating at least one file attribute parameter having a user-defined name, and second data indicating a user-defined value of said at least one file attribute parameter, said file attribute parameter value representing an attribute of the conte.nt of the data file associated with. said record; and second means for perusing said node records to identify a first group of said data files wherein the contents of all data files of .said first group have a common attribute represented by the value of a file attribute parameter.
Claim 29
Dependent Claim
132 words
The data file storage and. retrieval apparatus according to claim 19 wherein said first means also stores link records in said computer accessed data storage device, each link record comprising third data indicating a user-selected pair of said data files, fourth data indicating at least one link attribute parameter having a user-defined name, and fifth data indicating a user-defined value of said at least one link attribute parameter, said at least one link attribute parameter value representing-an attribute of a relatiohship between said pair of data files; and wherein said second means also peruses said link records to identify a group of said link records each comprising fifth data indicating a common relationship attribute and each comprising third data indicating a pair of data files of said first group of data files.
Claim 30
Independent Claim
238 words
An apparatus for identifying files stored in a computer accessed data storage device comprising: means responsive to user input for storing node records, each node record corresponding to one of said stored data files and comprising first data indicating at least one file attribute parameter, and second data indicating a value of said at least one file attribute parameter, said file attribute parameter value representing an attribute of the content of the data file corresponding to said node record, and for also storing link records, each link record comprising third data identifying a pair of said data files, fourth data indicating at least one link attribute parameter, and fifth data indicating a value of said at least one link attribute parameter, said link attribute parameter value representing an attribute of a relationship between the contents of said pair of data files identified by said third data; and means responsive to user input for perusing.said link records to identify a. first group of said stored data files wherein each data file of said first group is related to a user selected one data file by a relationship attribute indicated by at least one user-inputted link attribute parameter value, and for perusing said node records to identify a first subgroup of said first group of stored data files wherein the contents of data files of said first subgroup have a common attribute represented by a user-inputted data file parameter value.
Claim 31
Independent Claim
238 words
An apparatus for identifying files stored in a computer accessed data storage device comprising: means responsive to user input for storing node records, each node record corresponding to one of said stored data files and comprising first data indicating at least one file attribute parameter, and second data indicating a value of said at least one file attribute parameter, said file attribute parameter value representing an attribute of the content of the data file corresponding to said node record, and for also storing link records, each link record comprising third data identifying a pair of said data files, fourth data indicating at least one link attribute parameter, and fifth data indicating a value of said at least one link attribute parameter, said link attribute parameter value representing an attribute of a relationship between the contents of said pair of data files identified by said third data; and means responsive to user input for perusing.said link records to identify a. first group of said stored data files wherein each data file of said first group is related to a user selected one data file by a relationship attribute indicated by at least one user-inputted link attribute parameter value, and for perusing said node records to identify a first subgroup of said first group of stored data files wherein the contents of data files of said first subgroup have a common attribute represented by a user-inputted data file parameter value.
Claim 32
Independent Claim
279 words
An apparatus for storing and identifying successive versions of successively changed content of data files stored in a computer accessed data storage device, the apparatus comprising: first means for creating and storing a version history record when the content of one of said data files undergoes a change, the version history record comprising a set of instructions for recreating a version of the content of said one data file existing immediately prior to the change by inserting data into and'deleting data from the content of said one data file existing immediately following the change, one such version history record being created and stored each time the data file is changed such that a version history record is associated with each successive version of the content of a file, and for creating and storing node records, each data file and each version history being associated with one of said node records, each said node record comprising first data indicating at least one file attribute parameter and second data indicating a value for said at least one file attribute parameter,, said .file attribute parameter value representing a file content attribute, each node record being assigned a time parameter value established according to the time the file content version associated with the node record was first stored as the content of a data file; and second means for identifying a first group of said node records wherein each node record of said first group comprises data indicating a user selected file attribute parameter value and having an assigned time parameter value indicating the file content version associated with the node record was stored in a file as of a user selected time.
Claim 33
Independent Claim
279 words
An apparatus for storing and identifying successive versions of successively changed content of data files stored in a computer accessed data storage device, the apparatus comprising: first means for creating and storing a version history record when the content of one of said data files undergoes a change, the version history record comprising a set of instructions for recreating a version of the content of said one data file existing immediately prior to the change by inserting data into and'deleting data from the content of said one data file existing immediately following the change, one such version history record being created and stored each time the data file is changed such that a version history record is associated with each successive version of the content of a file, and for creating and storing node records, each data file and each version history being associated with one of said node records, each said node record comprising first data indicating at least one file attribute parameter and second data indicating a value for said at least one file attribute parameter,, said .file attribute parameter value representing a file content attribute, each node record being assigned a time parameter value established according to the time the file content version associated with the node record was first stored as the content of a data file; and second means for identifying a first group of said node records wherein each node record of said first group comprises data indicating a user selected file attribute parameter value and having an assigned time parameter value indicating the file content version associated with the node record was stored in a file as of a user selected time.
Claim 34
Dependent Claim
67 words
The apparatus according to claim 22 further comprising: third means for changing a value of at least one file attribute parameter indicated by at least one node record from a first value to a second value; and fourth means for storing a file attribute parameter value record comprising data indicating said first value and indicating when said at least one file attribute parameter had said first value.
Claim 35
Dependent Claim
91 words
The apparatus according to claim 22 wherein said first means also creates and stores link records, each link record comprising third data identifying a pair of node records according to said time parameter values, fourth data indicating at least one link attribute parameter, and fifth data indicating at least one link attribute parameter value for said at least one link attribute parameter, said at least one link attribute parameter value representing an attribute of a relationship between a pair of data file content versions associated with a pair of data files.
Claim 36
Independent Claim
384 words
An apparatus for storing and identifying successive versions of successively changed content of data files stored in a computer accessed data storage, device, the apparatus comprising: means for creating and storing a version history record when the content of one of said data files undergoes a change, the version history record comprising a set of instructions for recreating a version of the content of said one data file existing immediately prior to the change by inserting data into and deleting data from the content of said one data file existing immediately after the change, one such version history record being created and stored each time the data file is changed such that a version history record is associated with each successive version of the content of a file; means for creating and storing node records, each data file and each version history being associated with one of said node records, each said node record comprising first data indicating at least one file attribute parameter and second data indicating a value for said at least one file attribute parameter, said file attribute parameter value representing a file content attribute; means for creating and storing link records, each link record comprising third data identifying a pair of node records according to said time parameter values, fourth data indicating at least one link attribute parameter, and fifth data indicating a value for said at least one link attribute parameter, said link attribute parameter value representing an attribute of a relationship between a pair of data file content versions associated with said pair of data files; each of said node records being assigned a time parameter value established according to the time the file content version associated with the node record was first stored as the content of a data file, and each said link record being assigned a time parameter value established according to the time the link record was stored; and means responsive to user input for perusing said link records to identify a first group of said link records each comprising data indicating that the content of a user-selected one of said stored data files as of a user-inputted time is related to the content of another of said stored data files as of said user-inputted time according to a user-inputted link attribute parameter value.
Claim 37
Independent Claim
384 words
An apparatus for storing and identifying successive versions of successively changed content of data files stored in a computer accessed data storage, device, the apparatus comprising: means for creating and storing a version history record when the content of one of said data files undergoes a change, the version history record comprising a set of instructions for recreating a version of the content of said one data file existing immediately prior to the change by inserting data into and deleting data from the content of said one data file existing immediately after the change, one such version history record being created and stored each time the data file is changed such that a version history record is associated with each successive version of the content of a file; means for creating and storing node records, each data file and each version history being associated with one of said node records, each said node record comprising first data indicating at least one file attribute parameter and second data indicating a value for said at least one file attribute parameter, said file attribute parameter value representing a file content attribute; means for creating and storing link records, each link record comprising third data identifying a pair of node records according to said time parameter values, fourth data indicating at least one link attribute parameter, and fifth data indicating a value for said at least one link attribute parameter, said link attribute parameter value representing an attribute of a relationship between a pair of data file content versions associated with said pair of data files; each of said node records being assigned a time parameter value established according to the time the file content version associated with the node record was first stored as the content of a data file, and each said link record being assigned a time parameter value established according to the time the link record was stored; and means responsive to user input for perusing said link records to identify a first group of said link records each comprising data indicating that the content of a user-selected one of said stored data files as of a user-inputted time is related to the content of another of said stored data files as of said user-inputted time according to a user-inputted link attribute parameter value.
Claim 38
Dependent Claim
126 words
A data file storage and retrieval apparatus comprising: a computer accessed data storage device for storing data files; means for transmitting data files to and retrieving data files from said computer accessed data storage device, said data files being stored therein and retrieved therefrom according to commands provided to a computer operating system adapted to control storage and retrieval of files in said computer accessed data storage device and adapted to execute user-provided programs; and means for transmitting a first user-defined character string to the computer operating system whenever at lea.st one of said data files is retrieved, said first user-defined character string comprising an instruction for said computer operating system to initiate execution of a user-provided program stored in said computer accessed data storage device.
Claim 39
Dependent Claim
126 words
A data file storage and retrieval apparatus comprising: a computer accessed data storage device for storing data files; means for transmitting data files to and retrieving data files from said computer accessed data storage device, said data files being stored therein and retrieved therefrom according to commands provided to a computer operating system adapted to control storage and retrieval of files in said computer accessed data storage device and adapted to execute user-provided programs; and means for transmitting a first user-defined character string to the computer operating system whenever at lea.st one of said data files is retrieved, said first user-defined character string comprising an instruction for said computer operating system to initiate execution of a user-provided program stored in said computer accessed data storage device.
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