147 — Unit of usage
| Code | Description | History |
|---|---|---|
01
|
Copies
Maximum number of copies that may be made of a permitted extract |
+9 |
02
|
Characters
Maximum number of characters in a permitted extract for a specified usage |
+9 |
03
|
Words
Maximum number of words in a permitted extract for a specified usage |
+9 |
04
|
Pages
Maximum number of pages in a permitted extract for a specified usage |
+9 |
05
|
Percentage
Maximum percentage of total content in a permitted extract for a specified usage |
+9 |
06
|
Devices
Maximum number of devices in ‘share group’ |
+9 |
07
|
Concurrent users
modified
Maximum number of concurrent users. NB where the number of concurrent users is specifically not limited, set the number of concurrent users to zero |
+9 · ✎15 |
08
|
Percentage per time period
Maximum percentage of total content which may be used in a specified usage per time period; the time period being specified as another <EpubUsageLimit> Quantity |
+11 |
09
|
Days
modified
Maximum time period in days (beginning from product purchase or activation) |
+11 · ✎36 |
10
|
Times
Maximum number of times a specified usage event may occur (in the lifetime of the product) |
+11 |
11
|
Allowed usage start page
Page number where allowed usage begins. <Quantity> should contain an absolute page number, counting the cover as page 1. (This type of page numbering should not be used where the e-publication has no fixed pagination). Use with (max number of) Pages, Percentage of content, or End page to specify pages allowed in Preview |
+14 |
12
|
Allowed usage end page
Page number at which allowed usage ends. <Quantity> should contain an absolute page number, counting the cover as page 1. (This type of page numbering should not be used where the e-publication has no fixed pagination). Use with Start page to specify pages allowed in a preview |
+14 |
13
|
Weeks
Maximum time period in weeks |
+17 |
14
|
Months
Maximum time period in months |
+17 |
15
|
Users
Maximum number of licensed individual users, independent of concurrency of use |
+40 |
16
|
Hours minutes and seconds
Maximum amount of time in hours, minutes and seconds allowed in a permitted extract for a specified usage, in the format HHHMMSS (7 digits, with leading zeros if necessary) |
+42 |
17
|
Allowed usage start time
modified
Time at which allowed usage begins. <Quantity> should contain an absolute time, counting from the beginning of an audio or video product, in the format HHHMMSS or HHHMMSScc. Use with Time, Percentage of content, or End time to specify time-based extract allowed in Preview |
+42 · ✎44 |
18
|
Allowed usage end time
modified
Time at which allowed usage ends. <Quantity> should contain an absolute time, counting from the beginning of an audio or video product, in the format HHHMMSS or HHHMMSScc. Use with Start time to specify time-based extract allowed in Preview |
+42 · ✎44 |
19
|
Concurrent classes
modified
Maximum number of licensed concurrent classes of user. A ‘class’ is a group of learners attending a specific course or lesson and generally taught as a group |
+45 · ✎53 |
20
|
Classes
modified
Maximum number of licensed classes of learners, independent of concurrency of use and the number of users per class |
+45 · ✎53 |
21
|
Dots per inch
Maximum resolution of printed or copy / pasted extracts |
+28 |
22
|
Times per day
Maximum frequency a specified usage event may occur (per day) |
+36 |
23
|
Times per month
Maximum frequency a specified usage event may occur (per month) |
+35 |
24
|
Times per year
Maximum frequency a specified usage event may occur (per year) |
+35 |
26
|
Dots per cm
Maximum resolution of printed or copy / pasted extracts |
+36 |
27
|
Days (fixed start)
Maximum time period in days (beginning from the product publication date). In effect, this defines a fixed end date for the license independent of the purchase or activation date |
+36 |
28
|
Weeks (fixed start)
Maximum time period in weeks |
+36 |
29
|
Months (fixed start)
Maximum time period in months |
+36 |
31
|
Institutions
Maximum number of licensed institutions, independent of concurrency of use and the number of classes or individuals per institution |
+53 |
98
|
Valid from
The date from which the usage constraint applies. <Quantity> is in the format YYYYMMDD |
+46 |
99
|
Valid to
The date until which the usage constraint applies. <Quantity> is in the format YYYYMMDD |
+46 |