Class: Timestamp

_A Timestamp represents a point in time independent of any time zone or local calendar, encoded as a count of seconds and fractions of seconds at nanosecond resolution. The count is relative to an epoch at UTC midnight on January 1, 1970, in the proleptic Gregorian calendar which extends the Gregorian calendar backwards to year one. All minutes are 60 seconds long. Leap seconds are "smeared" so that no leap second table is needed for interpretation, using a 24-hour linear smear. The range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By restricting to that range, we ensure that we can convert to and from RFC 3339 date strings. # Examples Example 1: Compute Timestamp from POSIX time(). Timestamp timestamp; timestamp.set_seconds(time(NULL)); timestamp.set_nanos(0); Example 2: Compute Timestamp from POSIX gettimeofday(). struct timeval tv; gettimeofday(&tv, NULL); Timestamp timestamp; timestamp.set_seconds(tv.tv_sec); timestamp.set_nanos(tv.tv_usec * 1000); Example 3: Compute Timestamp from Win32 GetSystemTimeAsFileTime(). FILETIME ft; GetSystemTimeAsFileTime(&ft); UINT64 ticks = (((UINT64)ft.dwHighDateTime) << 32) | ft.dwLowDateTime; // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z. Timestamp timestamp; timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL)); timestamp.set_nanos((INT32) ((ticks % 10000000) * 100)); Example 4: Compute Timestamp from Java System.currentTimeMillis(). long millis = System.currentTimeMillis(); Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis / 1000) .setNanos((int) ((millis % 1000) * 1000000)).build(); Example 5: Compute Timestamp from Java Instant.now(). Instant now = Instant.now(); Timestamp timestamp = Timestamp.newBuilder().setSeconds(now.getEpochSecond()) .setNanos(now.getNano()).build(); Example 6: Compute Timestamp from current time in Python. timestamp = Timestamp() timestamp.GetCurrentTime() # JSON Mapping In JSON format, the Timestamp type is encoded as a string in the RFC 3339 format. That is, the format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z" where {year} is always expressed using four digits while {month}, {day}, {hour}, {min}, and {sec} are zero-padded to two digits each. The fractional seconds, which can go up to 9 digits (i.e. up to 1 nanosecond resolution), are optional. The "Z" suffix indicates the timezone ("UTC"); the timezone is required. A proto3 JSON serializer should always use UTC (as indicated by "Z") when printing the Timestamp type and a proto3 JSON parser should be able to accept both UTC and other timezones (as indicated by an offset). For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past 01:30 UTC on January 15, 2017. In JavaScript, one can convert a Date object to this format using the standard toISOString() method. In Python, a standard datetime.datetime object can be converted to this format using strftime with the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one can use the Joda Time's ISODateTimeFormat.dateTime() to obtain a formatter capable of generating timestamps in this format. _

URI: phenopackets:Timestamp

erDiagram Timestamp { integer nanos integer seconds }

Slots

Name	Cardinality and Range	Description	Inheritance
nanos	0..1 Integer	Non-negative fractions of a second at nanosecond resolution	direct
seconds	0..1 Integer	Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z	direct

Identifier and Mapping Information

Schema Source

from schema: https://w3id.org/linkml/phenopackets/phenopackets

Mappings

Mapping Type	Mapped Value
self	phenopackets:Timestamp
native	phenopackets:Timestamp

LinkML Source

Direct

name: Timestamp
description: 'A Timestamp represents a point in time independent of any time zone
  or local calendar, encoded as a count of seconds and fractions of seconds at nanosecond
  resolution. The count is relative to an epoch at UTC midnight on January 1, 1970,
  in the proleptic Gregorian calendar which extends the Gregorian calendar backwards
  to year one.  All minutes are 60 seconds long. Leap seconds are "smeared" so that
  no leap second table is needed for interpretation, using a [24-hour linear smear](https://developers.google.com/time/smear).  The
  range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By restricting
  to that range, we ensure that we can convert to and from [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt)
  date strings.  # Examples  Example 1: Compute Timestamp from POSIX `time()`.  Timestamp
  timestamp; timestamp.set_seconds(time(NULL)); timestamp.set_nanos(0);  Example 2:
  Compute Timestamp from POSIX `gettimeofday()`.  struct timeval tv; gettimeofday(&tv,
  NULL);  Timestamp timestamp; timestamp.set_seconds(tv.tv_sec); timestamp.set_nanos(tv.tv_usec
  * 1000);  Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.  FILETIME
  ft; GetSystemTimeAsFileTime(&ft); UINT64 ticks = (((UINT64)ft.dwHighDateTime) <<
  32) | ft.dwLowDateTime;  // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
  // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z. Timestamp timestamp;
  timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL)); timestamp.set_nanos((INT32)
  ((ticks % 10000000) * 100));  Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.  long
  millis = System.currentTimeMillis();  Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis
  / 1000) .setNanos((int) ((millis % 1000) * 1000000)).build();   Example 5: Compute
  Timestamp from Java `Instant.now()`.  Instant now = Instant.now();  Timestamp timestamp
  = Timestamp.newBuilder().setSeconds(now.getEpochSecond()) .setNanos(now.getNano()).build();   Example
  6: Compute Timestamp from current time in Python.  timestamp = Timestamp() timestamp.GetCurrentTime()  #
  JSON Mapping  In JSON format, the Timestamp type is encoded as a string in the [RFC
  3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
  where {year} is always expressed using four digits while {month}, {day}, {hour},
  {min}, and {sec} are zero-padded to two digits each. The fractional seconds, which
  can go up to 9 digits (i.e. up to 1 nanosecond resolution), are optional. The "Z"
  suffix indicates the timezone ("UTC"); the timezone is required. A proto3 JSON serializer
  should always use UTC (as indicated by "Z") when printing the Timestamp type and
  a proto3 JSON parser should be able to accept both UTC and other timezones (as indicated
  by an offset).  For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
  01:30 UTC on January 15, 2017.  In JavaScript, one can convert a Date object to
  this format using the standard [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString)
  method. In Python, a standard `datetime.datetime` object can be converted to this
  format using [`strftime`](https://docs.python.org/2/library/time.html#time.strftime)
  with the time format spec ''%Y-%m-%dT%H:%M:%S.%fZ''. Likewise, in Java, one can
  use the Joda Time''s [`ISODateTimeFormat.dateTime()`]( http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D
  ) to obtain a formatter capable of generating timestamps in this format.  '
from_schema: https://w3id.org/linkml/phenopackets/phenopackets
attributes:
  nanos:
    name: nanos
    annotations:
      rank:
        tag: rank
        value: 2
    description: Non-negative fractions of a second at nanosecond resolution. Negative
      second values with fractions must still have non-negative nanos values that
      count forward in time. Must be from 0 to 999,999,999 inclusive.
    from_schema: https://w3id.org/linkml/phenopackets/phenopackets
    rank: 1000
    domain_of:
    - Timestamp
    range: integer
  seconds:
    name: seconds
    annotations:
      rank:
        tag: rank
        value: 1
    description: Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z.
      Must be from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z inclusive.
    from_schema: https://w3id.org/linkml/phenopackets/phenopackets
    rank: 1000
    domain_of:
    - Timestamp
    range: integer

Induced

name: Timestamp
description: 'A Timestamp represents a point in time independent of any time zone
  or local calendar, encoded as a count of seconds and fractions of seconds at nanosecond
  resolution. The count is relative to an epoch at UTC midnight on January 1, 1970,
  in the proleptic Gregorian calendar which extends the Gregorian calendar backwards
  to year one.  All minutes are 60 seconds long. Leap seconds are "smeared" so that
  no leap second table is needed for interpretation, using a [24-hour linear smear](https://developers.google.com/time/smear).  The
  range is from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59.999999999Z. By restricting
  to that range, we ensure that we can convert to and from [RFC 3339](https://www.ietf.org/rfc/rfc3339.txt)
  date strings.  # Examples  Example 1: Compute Timestamp from POSIX `time()`.  Timestamp
  timestamp; timestamp.set_seconds(time(NULL)); timestamp.set_nanos(0);  Example 2:
  Compute Timestamp from POSIX `gettimeofday()`.  struct timeval tv; gettimeofday(&tv,
  NULL);  Timestamp timestamp; timestamp.set_seconds(tv.tv_sec); timestamp.set_nanos(tv.tv_usec
  * 1000);  Example 3: Compute Timestamp from Win32 `GetSystemTimeAsFileTime()`.  FILETIME
  ft; GetSystemTimeAsFileTime(&ft); UINT64 ticks = (((UINT64)ft.dwHighDateTime) <<
  32) | ft.dwLowDateTime;  // A Windows tick is 100 nanoseconds. Windows epoch 1601-01-01T00:00:00Z
  // is 11644473600 seconds before Unix epoch 1970-01-01T00:00:00Z. Timestamp timestamp;
  timestamp.set_seconds((INT64) ((ticks / 10000000) - 11644473600LL)); timestamp.set_nanos((INT32)
  ((ticks % 10000000) * 100));  Example 4: Compute Timestamp from Java `System.currentTimeMillis()`.  long
  millis = System.currentTimeMillis();  Timestamp timestamp = Timestamp.newBuilder().setSeconds(millis
  / 1000) .setNanos((int) ((millis % 1000) * 1000000)).build();   Example 5: Compute
  Timestamp from Java `Instant.now()`.  Instant now = Instant.now();  Timestamp timestamp
  = Timestamp.newBuilder().setSeconds(now.getEpochSecond()) .setNanos(now.getNano()).build();   Example
  6: Compute Timestamp from current time in Python.  timestamp = Timestamp() timestamp.GetCurrentTime()  #
  JSON Mapping  In JSON format, the Timestamp type is encoded as a string in the [RFC
  3339](https://www.ietf.org/rfc/rfc3339.txt) format. That is, the format is "{year}-{month}-{day}T{hour}:{min}:{sec}[.{frac_sec}]Z"
  where {year} is always expressed using four digits while {month}, {day}, {hour},
  {min}, and {sec} are zero-padded to two digits each. The fractional seconds, which
  can go up to 9 digits (i.e. up to 1 nanosecond resolution), are optional. The "Z"
  suffix indicates the timezone ("UTC"); the timezone is required. A proto3 JSON serializer
  should always use UTC (as indicated by "Z") when printing the Timestamp type and
  a proto3 JSON parser should be able to accept both UTC and other timezones (as indicated
  by an offset).  For example, "2017-01-15T01:30:15.01Z" encodes 15.01 seconds past
  01:30 UTC on January 15, 2017.  In JavaScript, one can convert a Date object to
  this format using the standard [toISOString()](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString)
  method. In Python, a standard `datetime.datetime` object can be converted to this
  format using [`strftime`](https://docs.python.org/2/library/time.html#time.strftime)
  with the time format spec ''%Y-%m-%dT%H:%M:%S.%fZ''. Likewise, in Java, one can
  use the Joda Time''s [`ISODateTimeFormat.dateTime()`]( http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D
  ) to obtain a formatter capable of generating timestamps in this format.  '
from_schema: https://w3id.org/linkml/phenopackets/phenopackets
attributes:
  nanos:
    name: nanos
    annotations:
      rank:
        tag: rank
        value: 2
    description: Non-negative fractions of a second at nanosecond resolution. Negative
      second values with fractions must still have non-negative nanos values that
      count forward in time. Must be from 0 to 999,999,999 inclusive.
    from_schema: https://w3id.org/linkml/phenopackets/phenopackets
    rank: 1000
    alias: nanos
    owner: Timestamp
    domain_of:
    - Timestamp
    range: integer
  seconds:
    name: seconds
    annotations:
      rank:
        tag: rank
        value: 1
    description: Represents seconds of UTC time since Unix epoch 1970-01-01T00:00:00Z.
      Must be from 0001-01-01T00:00:00Z to 9999-12-31T23:59:59Z inclusive.
    from_schema: https://w3id.org/linkml/phenopackets/phenopackets
    rank: 1000
    alias: seconds
    owner: Timestamp
    domain_of:
    - Timestamp
    range: integer