Make your own eBooks

Use our Remix App to mix & match content. In minutes make your own course packs, training bundles, custom travel guides, you name it. Even add your own title & cover.


Slices & Articles Get by the slice or add to your own ebook

Medium 9780596006341

19. Working with Dates, Times, and Durations

Priscilla Walmsley O'Reilly Media ePub

XQuery provides advanced capabilities for querying, creating, and manipulating date-related values. There are eleven date-related types built into XQuery. They fall into three categories:

The date and time types, which represent a point in timefor example, a specific date or time

The duration types, which represent periods of time, such as a number of years or minutes

The date component types, which represent parts of dates, such as the year 2006, the month of May, or the 10th day of each month

This chapter explains the date-related types used in XQuery and the functions and operators that act on them.

Three types represent specific dates and/or times: xs:date, xs:time, and xs:dateTime. These XML Schema built-in types are based on the ISO 8601 standard. They are summarized in Table 19-1.

Table19-1.Summary of date and time types

Type name









Date and time





See All Chapters
Medium 9781934989111

Chapter 14: The Fear Of Death

J Krishnamurti Krishnamurti Foundation America ePub
Medium 9781588437907

People & Culture

Li Martin Hunter Publishing ePub

Scotlands population numbers just over five million and is declining. Like the rest of Britain, its people descend from various northern tribes, including the Picts, Celts, Scandinavians and, to a lesser extent, Romans.

Scottish, Scotch or Scots?

A Scottish person is called a Scot. Never describe a Scot as English or, at best, theyll never speak to you again. Scots are above all else Scottish. Similarly, dont refer to Britain (or worse, Scotland) as England and dont call a thistle a rose.

Scottish is the adjective used to describe something or someone that originates from Scotland, as in Scottish castle.

Scotch describes certain Scottish products, for example Scotch whisky and Scotch eggs.

Scots is used in limited contexts, for example to describe certain regiments, as in Scots Guards.

Scots divide themselves into Highlanders and Lowlanders. In Orkney and Shetland, the Norse rather than Gaelic influence predominates. Jocular stereotypes of the Scotsman range from the dour, tight-fisted, heart-attack-waiting-to-happen, who eats deep-fried Mars bars, drinks (lots of) pints of heavy and supports any team playing against England to the kilted bagpiper who eats haggis, neeps and tatties when hes not munching shortbread, and sips wee drams of whisky.

See All Chapters
Medium 9781588438188

The Frozen World Of Glaciers

Norton, Clark Hunter Publishing ePub

Glaciers begin to form when tons and tons of snow accumulate on mountaintops and are then squeezed and solidified into huge, incredibly heavy expanses of ice. The force of gravity then pulls the glaciers downhill into valleys, where they turn into massive, moving rivers of ice. As they grow by accumulating ice, glaciers are labeled as "advancing" and as they shrink - melting faster than they accumulate snow and ice - they are labeled as "retreating." Alaska - which has a remarkable 100,000 glaciers - currently has both advancing and retreating glaciers, and, over time, an advancing glacier can become a retreating one, or vice versa (the Hubbard Glacier is a good current example). Retreating glaciers produce higher sea levels, making them one of the major threats of global warming. As one NPS ranger quips sardonically, "Never buy land downstream from a glacier." 

Whether advancing or retreating, most glaciers move slowly - at a "glacial" pace, if you will - usually no more than a few feet a day. Some, however, move much faster. The Columbia Glacier near the Gulf of Alaska is reported to have reached a record velocity by retreating more than 100 feet per day in 1999. No matter their speed, each time glaciers move, they resculpt the landscape below them. One major result is the fjords you see in Alaska: valleys carved by glaciers that are then flooded with sea water. A less scenic result is moraines: mounds of crushed rock, silt and other debris that glaciers deposit along their sides as they move. Moraines often make glaciers look "dirty" around the edges, but this is a strictly natural phenomenon and doesn't detract from their overall beauty once you get up close enough to view the details. Rather than solid blocks of ice, you'll see that the glaciers' faces, as their front walls are called, are scored by deep fissures, pocked with ice caves at the water's edge and topped by jagged spires and rounded arches. Often a stunning deep blue, glaciers are awesome both in appearance and sheer power.  

See All Chapters
Medium 9781781606124

The Unprecedented Sculptor

Eugène Müntz Parkstone International ePub


Michelangelos childhood and studious youth are perhaps the reasons behind the important place of sculpture in his works. As a child, his wet nurse was the wife of a stonecutter, so stone and chisel were handy, natural toys to him. And he enjoyed tracing his creativity back to the quarries. Another milestone was Michelangelos visit to the San Marco gardens in the Medici Palace. Here he mixed with a wide range of Humanists and realized the artistic rewards of audacity, impetuosity and open-mindedness. Finally, he discovered the treasures of Antiquity that would nourish him with lifelong inspiration.


Michelangelo, on his own, advanced beyond the influence of his masters and developed his own clear ideas about what constituted a good sculptor. For example, he grasped that a mastery of human anatomy was an absolute prerequisite to fine sculpture and broke the taboo during that period on human dissection. From the prior of the Santo Spirito hospital, he obtained permission to study unclaimed corpses. However illegal the experience and detrimental to his health at times, Michelangelo thought it essential and even took pride in it. He openly bragged of the precision it added to the lines he reproduced. However great his talents in drawing, painting and architecture, he was drawn to art because of sculpture, and sculpture established his fame.

See All Chapters

See All Slices