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AAT ICAS 3030 ✧ aaticas namespace specifications

document note: this document is part of the Integrated Chronological Applications System (ICAS). Alliance for the Advancement of Technology (AAT) provides ICAS standards documents subject to terms of use described in document AAT ICAS 9010. please refer to other key AAT ICAS standards documents accessible via the AAT ICAS web site at for important information about ICAS.

aaticas namespace specifications

this document describes a system of elements in the aaticas namespace specified for uses of ICAS. elements in the aaticas namespace are modeled in part on established XML standards developed by the W3 Consortium ( and the Dublin Core Metadata Initiative ( to accommodate the canonical and normative representation of uniform systems of date and time. element schemes offer flexibility for the localization of unique name identifiers for particular date and time elements.

ICAS methods for the representation of time and date formats are modeled in part on the time and date format methods described in ISO 8601 (please refer to and ISO 8601 standards can be referenced as preferred methods for designating numerical expressions of traditional scales of date and time; however alphanumeric representations of traditional scales of date and time can also be designed in terms of ICAS format specifications. ICAS Developers are strongly encouraged to design for interchange-readiness.

the aaticas namespace is under co-review with for purposes of harmonizing ICAS and TimeML (Markup Language for Temporal and Event Expressions) specifications. additional review goals and objectives may be specified later.

please refer to the following documents for additional particular information about elements in the aaticas namespace:

please note that ICAS elements may also be represented via a different namespace if the canonical form of the namespace conforms with ICAS standards. namespace elements and structures are however subject to change in subsequent versions of ICAS.

top document updated:

system identifiersdatetime
Uniform CalendarUCUCN 12019 S19 Yellow
Inter-Dial ClockIDCzone(UT)t339 tt050
'ICAS in use' can accommodate calendar and clock formatting 'for all people, for all time'.
day of yearD-o-YAD common year day139
Gregorian calendarGG2019 May 19 Sunday
seconds, minutes, hoursSMHUT08:08:14
style legend


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