start_date Start Date

Date on which the document starts being free-to-read or begins the given license, as defined in NISO RP-22-2015, Access License and Indicators.

Usage/Remarks

Best Practice

NISO RP-22-2015 recommends that the start date be given in the ISO-8601 format “YYYY-MM-DD”, without inclusion of a time or a time zone.
OPTIONAL on elements: <ali:free_to_read>, <ali:license_ref>
Value Meaning
Text, numbers, or special characters The ISO 8601 date on which the document starts being free-to-read or begins the given license.
Restriction @start_date is an optional attribute; there is no default.
Tagged Samples
Free-to-read flag with both start and end dates. After the end date, the document will no longer be free to read.
...
<permissions>
 <ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" 
   start_date="2014-01-01" end_date="2014-12-31"/>
</permissions>
...
An example of licensing and usage rights changing over time. The content is under a proprietary license from psychoceramics.org at first (February 3, 2014; initial publication) and then under a CC BY license a year later.
...
<permissions>
 <license>
  <ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2014-02-03">
   http://www.psychoceramics.org/license_v1.html</ali:license_ref>
  <ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2015-02-03">
   http://creativecommons.org/licenses/by/3.0/</ali:license_ref>
 </license>
</permissions>
...