Linked Open Data for Calendar Formats

A calendar contains structured information necessary to capture and exchange information normally stored within a calendaring, scheduling, or to-do list application, whether a Personal Information Manager (PIM) or a Group Scheduling product. Calendars support operations such as requesting, replying to, modifying, and canceling meetings or appointments, to-dos or tasks, reminders and journal entries, and potentially support other calendaring and scheduling operations such as requesting for and replying with free/busy time data. Calendar objects are extensions of the text/directory MIME type.

The significant properties of calendars are documented in a Calendars Preservation Plan, which can be used as test criteria for tools and processes used in format transformations.

NARA makes its Linked Open Data available in the Resource Description Framework Terse RDF Triple Language, or RDF Turtle (.ttl files). These files can be opened in any text editor. The Digital Preservation Framework as Linked Open Data includes the same elements as are available in the version of the Preservation Plans on GitHub.

These Plans are not exhaustive nor universally applicable proposed actions and recommended or endorsed tools: these represent file formats and variant versions in NARA holdings, the current NARA risk assessment, processing capabilities, and tools in use at NARA.


Format Name File Extension(s) Digital Preservation Framework Category/Categories NARA Format ID NARA Linked Open Data TTL
iCalendar ics|ical|ifb|icalendar Databases|Calendars NF00209
Microsoft Schedule+ Contacts scd Databases|Calendars NF00404