Standard tags in SGML and XML are required for names and for spacetime coordinates on Earth - what a spacetime DTD solves.
Even on Earth within historical time (back to roughly 10,000 BCE = 12,000 years ago, some non-obvious considerations apply to specifications of blocks of spacetime. But certainly a key requirement is that coordinates of a particular place on the Earth ought to be as stable as its rocks and strata, so that a 'location' on the Earth's surface has its usual meaning.
Here are some of the non-obvious considerations of a terrestrial coordinate system going back 12,000 years and useful in geology and geography, paleontology and biology, ecology and climate, archaeology and en:history, while still being absolutely unambiguous about what time and place means in the present:
If you know of an existing DTD that actually does this correctly and solves the problems of history and geography above, by all means dig it up and let's talk about it, and improve it here. But it appears at present that the Wikipedia already has problems that we should solve before we get into the issues of a Wikipediatlas.
See also
Standard tags in SGML and XML are required for names and for spacetime coordinates on Earth - what a spacetime DTD solves.
Even on Earth within historical time (back to roughly 10,000 BCE = 12,000 years ago, some non-obvious considerations apply to specifications of blocks of spacetime. But certainly a key requirement is that coordinates of a particular place on the Earth ought to be as stable as its rocks and strata, so that a 'location' on the Earth's surface has its usual meaning.
Here are some of the non-obvious considerations of a terrestrial coordinate system going back 12,000 years and useful in geology and geography, paleontology and biology, ecology and climate, archaeology and en:history, while still being absolutely unambiguous about what time and place means in the present:
If you know of an existing DTD that actually does this correctly and solves the problems of history and geography above, by all means dig it up and let's talk about it, and improve it here. But it appears at present that the Wikipedia already has problems that we should solve before we get into the issues of a Wikipediatlas.
See also