From 41dc8e12f1fd9cef4069cae200229c52e15af9f8 Mon Sep 17 00:00:00 2001 From: Chris Little Date: Tue, 19 Sep 2023 22:21:59 +0100 Subject: [PATCH 1/7] Minor-editorial-corrections --- 23-049/sections/06-abstract_model.adoc | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/23-049/sections/06-abstract_model.adoc b/23-049/sections/06-abstract_model.adoc index 761986f4..70b9d43b 100644 --- a/23-049/sections/06-abstract_model.adoc +++ b/23-049/sections/06-abstract_model.adoc @@ -128,7 +128,7 @@ This regime constitutes an Ordinal Temporal Reference System, with discrete enum === Simple Clocks and Discrete Timescales -In this regime, a clock is defined as any regularly repeating physical phenomena, such as pendulum swings, earth's rotation about sun, earth's rotation about its axis, heart beats, vibrations of electrically stimulated quartz crystals or the resonance of the unperturbed ground-state hyperfine transition frequency of the caesium 133 atom. Some phenomena make better clocks that others, in terms of the number of repetitions possible, the consistency of each repetition and the precision of each 'tick'. A mechanism for counting, or possibly measuring, the ticks is desirable. +In this regime, a clock is defined as any regularly repeating physical phenomena, such as pendulum swings, earth's rotation about the sun, earth's rotation about its axis, heart beats, vibrations of electrically stimulated quartz crystals or the resonance of the unperturbed ground-state hyperfine transition frequency of the caesium-133 atom. Some phenomena make better clocks that others, in terms of the number of repetitions possible, the consistency of each repetition and the precision of each 'tick'. A mechanism for counting, or possibly measuring, the ticks is desirable. It is an assumption that the ticks are regular and homogeneous. @@ -182,7 +182,7 @@ There are other regimes, which are out of scope of this document. This could inc ==== Local Solar Time -Local solar time may or may not correspond to the local statutory or legal time in a country. Local solar time can be construed as a clock and timescale, with an angular measure of the apparent position of the sun along the ecliptic (path through the sky) as the basic physical principle. +Local solar time may or may not correspond to the local statutory or legal time in a country. Local solar time can be construed as a clock and timescale, with an angular measure of the apparent position of the sun along the ecliptic (path through the sky) as the basic physical principle. But the sun does not appear to progress evenly along the ecliptic throughout the days and year. There may be variations of up to 15 minutes compared to an even angular speed ==== Astronomical Time @@ -250,7 +250,7 @@ The events from the list may be instants, such as the change of reign, or interv Other documents may enable two such 'king lists' to be related, though not completely. -=== Attributes of simple Clock and Discrete Timescale +=== Attributes of Simple Clock and Discrete Timescale A clock is a regular, repeating, physical event, or 'tick', that can be counted. The sequence of tick counts is a timescale. The ticks may be grouped into a Unit of Meaure for convenience. Other events can be compared to the ticks on the timescale. @@ -351,7 +351,7 @@ A long, deep, sediment core is extracted from the bottom of a lake with a long g === Attributes of Calendars -Calendars combine different timescales and their clocks and units of measure, and other events, to make a complex timeline against which events can be compared. Calculated algorithms are used to determine which instants of intervals on the compound timeline are identified and labeled. +Calendars combine different timescales and their clocks and units of measure, and other events, to make a complex timeline against which events can be compared. Calculated algorithms are used to determine which instants or intervals on the compound timeline are identified and labeled. The timeline is usually a set of instants from the past to the future and is compounded from multiple timescales, with multiple units of measures, and complicated arithmetic determined by the calendar algorithm(s). The timeline is usually not even continuous, having gaps or even multiple simultaneous representations. @@ -376,9 +376,9 @@ The timeline is usually a set of instants from the past to the future and is com . Optional notations [example] -The modern Gregorian calendar is calculated solar calendar, with various epochs from 1588 CE through to 1922 CE depending on location or country. +The modern Gregorian calendar is a calculated solar calendar, with various epochs from 1588 CE through to 1922 CE depending on location or country. -The constituent timescales are days (earth's rotations), months (moon's orbit around the earth), years (earth's orbit around the sun) and seconds determined by atomic clocks. To accommodate discrepancies, leap days and leap seconds are intercalated in some years. The commonest notations for the Gregorian calendar are <> and its various restrictive profiles. +The constituent timescales are days (earth's rotations), months (moon's orbit around the earth), years (earth's orbit around the sun) and seconds determined by atomic clocks. To accommodate discrepancies, leap days and leap seconds are intercalated in some years. The commonest notations for the Gregorian calendar are <> and its various restrictive profiles from other authoritative bodies such as IETF and W3C. [example] The timeline in a country may have gaps when clocks 'spring forward' for enacting daylight saving time. There may not be any time corresponding to the times between 01:00 and 02:00. When the daylight saving time is revoked, and clocks 'fall back', the times between 01:00 and 02:00 occur twice. From 96cf218a6500ce33a7e744ade4bcc2beff5a98c8 Mon Sep 17 00:00:00 2001 From: Chris Little Date: Tue, 19 Sep 2023 22:58:59 +0100 Subject: [PATCH 2/7] Update 04-terms_and_definitions.adoc --- 23-049/sections/04-terms_and_definitions.adoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/23-049/sections/04-terms_and_definitions.adoc b/23-049/sections/04-terms_and_definitions.adoc index 867cb57a..1909339f 100644 --- a/23-049/sections/04-terms_and_definitions.adoc +++ b/23-049/sections/04-terms_and_definitions.adoc @@ -54,7 +54,7 @@ point in time [.source] <> -NOTE: In this document an epoch is expressed in the Gregorian calendar as a decimal year. +NOTE: In the ISO 19111 document an epoch is expressed in the Gregorian calendar as a decimal year. [example] 2017-03-25 in the Gregorian calendar is epoch 2017.23. From 403dfe3d64fdd93208152d79773f6d1f02ada31a Mon Sep 17 00:00:00 2001 From: Chris Little Date: Wed, 11 Oct 2023 13:17:06 +0100 Subject: [PATCH 3/7] Update 02-conformance.adoc coorected clause reference --- 23-049/sections/02-conformance.adoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/23-049/sections/02-conformance.adoc b/23-049/sections/02-conformance.adoc index 500c98ff..702fb24f 100644 --- a/23-049/sections/02-conformance.adoc +++ b/23-049/sections/02-conformance.adoc @@ -1,6 +1,6 @@ == Conformance -Clause 6 of this International Standard uses the Unified Modeling Language (UML) to present +Clause 7 of this International Standard uses the Unified Modeling Language (UML) to present conceptual schemas for describing the higher level classes of time and temporal reference systems. These schemas define conceptual classes that a) may be considered to comprise a cross-domain application schema, or From c431e72ebc186bb9159dc032108e46a18db3400a Mon Sep 17 00:00:00 2001 From: Chris Little Date: Wed, 11 Oct 2023 13:23:00 +0100 Subject: [PATCH 4/7] Update 04-terms_and_definitions.adoc --- 23-049/sections/04-terms_and_definitions.adoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/23-049/sections/04-terms_and_definitions.adoc b/23-049/sections/04-terms_and_definitions.adoc index 1909339f..36b42d63 100644 --- a/23-049/sections/04-terms_and_definitions.adoc +++ b/23-049/sections/04-terms_and_definitions.adoc @@ -57,7 +57,7 @@ point in time NOTE: In the ISO 19111 document an epoch is expressed in the Gregorian calendar as a decimal year. [example] -2017-03-25 in the Gregorian calendar is epoch 2017.23. +2017-03-25 in the Gregorian calendar is epoch 2017.23. Other notations or reference systems are options. [[reference-frame_definition]] === reference frame From fe329abb842339a23693b9714ac406043c660df9 Mon Sep 17 00:00:00 2001 From: Chris Little Date: Wed, 11 Oct 2023 13:27:13 +0100 Subject: [PATCH 5/7] Update 06-abstract_model.adoc spelling --- 23-049/sections/06-abstract_model.adoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/23-049/sections/06-abstract_model.adoc b/23-049/sections/06-abstract_model.adoc index 70b9d43b..3e449a20 100644 --- a/23-049/sections/06-abstract_model.adoc +++ b/23-049/sections/06-abstract_model.adoc @@ -146,7 +146,7 @@ This regime constitutes a Temporal Coordinate Reference System, with discrete in === CRS and Continuous Timescales -This regime takes a clock from the previous regime and assumes that between any two adjacent ticks, it is possible to interpolate indefinitely to finer and finer precision, using ordinary arithmetic, rather than any physical device. Units of Measure may be defrined that are different from the 'ticks'. For example, a second may be defined as 9,192,631,770 vibrations of the ground-state hyperfine transition of the caesium 133 atom. Alternatively and differently, a second may be defined as 1/86400th of the rotation of the earth on its axis with respect to the sun. The count of rotations are the 'ticks' of an earth-day clock. This latter definition is not precise enough for many uses, as the rotaion of the earth on its axis varies from day to day. +This regime takes a clock from the previous regime and assumes that between any two adjacent ticks, it is possible to interpolate indefinitely to finer and finer precision, using ordinary arithmetic, rather than any physical device. Units of Measure may be defined that are different from the 'ticks'. For example, a second may be defined as 9,192,631,770 vibrations of the ground-state hyperfine transition of the caesium 133 atom. Alternatively and differently, a second may be defined as 1/86400th of the rotation of the earth on its axis with respect to the sun. The count of rotations are the 'ticks' of an earth-day clock. This latter definition is not precise enough for many uses, as the rotaion of the earth on its axis varies from day to day. Alternatively, it may be that the ticks are not counted but measured, and the precision of the clock is determined by the precision of the measurements, such as depth in an ice core, or angular position of an astronomical body, such as the sun, moon or a star. From cc3f71606f1846a7aa11dfa856340bf68142f849 Mon Sep 17 00:00:00 2001 From: Chris Little Date: Wed, 11 Oct 2023 13:28:26 +0100 Subject: [PATCH 6/7] Update 06-abstract_model.adoc spelling --- 23-049/sections/06-abstract_model.adoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/23-049/sections/06-abstract_model.adoc b/23-049/sections/06-abstract_model.adoc index 3e449a20..3afa42b0 100644 --- a/23-049/sections/06-abstract_model.adoc +++ b/23-049/sections/06-abstract_model.adoc @@ -146,7 +146,7 @@ This regime constitutes a Temporal Coordinate Reference System, with discrete in === CRS and Continuous Timescales -This regime takes a clock from the previous regime and assumes that between any two adjacent ticks, it is possible to interpolate indefinitely to finer and finer precision, using ordinary arithmetic, rather than any physical device. Units of Measure may be defined that are different from the 'ticks'. For example, a second may be defined as 9,192,631,770 vibrations of the ground-state hyperfine transition of the caesium 133 atom. Alternatively and differently, a second may be defined as 1/86400th of the rotation of the earth on its axis with respect to the sun. The count of rotations are the 'ticks' of an earth-day clock. This latter definition is not precise enough for many uses, as the rotaion of the earth on its axis varies from day to day. +This regime takes a clock from the previous regime and assumes that between any two adjacent ticks, it is possible to interpolate indefinitely to finer and finer precision, using ordinary arithmetic, rather than any physical device. Units of Measure may be defined that are different from the 'ticks'. For example, a second may be defined as 9,192,631,770 vibrations of the ground-state hyperfine transition of the caesium 133 atom. Alternatively and differently, a second may be defined as 1/86400th of the rotation of the earth on its axis with respect to the sun. The count of rotations are the 'ticks' of an earth-day clock. This latter definition is not precise enough for many uses, as the rotation of the earth on its axis varies from day to day. Alternatively, it may be that the ticks are not counted but measured, and the precision of the clock is determined by the precision of the measurements, such as depth in an ice core, or angular position of an astronomical body, such as the sun, moon or a star. From c633a83be314e86a99c3e6b1bf1e80a19981c51b Mon Sep 17 00:00:00 2001 From: Chris Little Date: Wed, 11 Oct 2023 13:34:14 +0100 Subject: [PATCH 7/7] Update 06-abstract_model.adoc spelling --- 23-049/sections/06-abstract_model.adoc | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/23-049/sections/06-abstract_model.adoc b/23-049/sections/06-abstract_model.adoc index 3afa42b0..de785129 100644 --- a/23-049/sections/06-abstract_model.adoc +++ b/23-049/sections/06-abstract_model.adoc @@ -206,7 +206,7 @@ The key to this approach is to ensure each moving feature of interest has its ow Relativistic effects may need to be taken into account for satellites and other space craft because of their relative speed and position in Earth's gravity well. -The presence of gravitational effects requires special relativity to be replaced by general relativity, and it can no longer be assumed that space (or space-time) is Euclidean. That is, Pythagoras' Theorem does not hold execept locally over small areas. This is somewhat familiar territory for geospatial experts. +The presence of gravitational effects requires special relativity to be replaced by general relativity, and it can no longer be assumed that space (or space-time) is Euclidean. That is, Pythagoras' Theorem does not hold except locally over small areas. This is somewhat familiar territory for geospatial experts. ==== Accountancy