Archive for January, 2008

24th Jan 2008

Semantic Web Primer 5

clipped from www.xml.com

Getting Started with Development


The major center of Semantic Web-related development thus far has been in
the area of RDF. The creation of semantically-richer documents is a relatively
easy task, so most of the effort has been concentrated on accumulating the
data, storing it and querying it. RDF/XML provides a useful intermediate
syntax which, when combined with tools like XSLT, allows multiple data sources
to be combined.

Further details on RDF tools and applications can be obtained from the W3C’s RDF home page, and the RDF category of XMLhack. In
this section I will concentrate on introducing tools useful for making a
relatively speedy start with Semantic Web development.

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24th Jan 2008

Semantic Web Primer 4

clipped from www.xml.com

XML Protocol Technology

Work on XML protocols — the use of XML for messaging and remote
procedure calls — approaches the Semantic Web from the other end of
the spectrum. Avoiding grand schemes for the classification of
everything, it is focused on standardizing XML-based interactions
between computers. A key component of XML protocol technology is the
description and discovery of web services available via XML protocols
such as SOAP, since systems require the ability to conduct electronic
transactions with other systems of which they have no prior
knowledge.

This requirement has led to the creation of technologies such as
Web Services Description Language (WSDL), which describes the
characteristics of the interface offered by a web service, and ADS,
which allows the advertisement and discovery of such services.
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24th Jan 2008

Semantic Web Primer 3

clipped from www.xml.com

In fact, work is now underway to take RDF Schemas one step further
in the description of ontologies. (An ontology is essentially a formal
description of objects and their interrelationships.) The MIT/LCS has
begun to define DAML (DARPA
Agent Markup Language), a language for expressing ontologies. Although
DAML is very much a work in progress, real work can be done now with
RDF Schemas, see the section on Redfoot below.

The hardest problem in this area is not the infrastructure, but the
actual ontologies themselves. Until an industry-wide ontology exists
for, say , vehicle parts, there is a limit to the utility of the SW in
the auto manufacturing industry. Organizations such as the Dublin Core Metadata Initiative
have been developing such vocabularies for some time now, and they’ve
made progress both in terms of the ontologies themselves and also
tools to manage and maintain them.

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24th Jan 2008

Semantic Web Primer 2

clipped from www.xml.com

The Semantic Web: A Primer
by Edd Dumbill
|
Pages: 1, 2

Semantic Web Technologies (con’td)

RDF, RDF Schemas and Ontologies


The W3C’s Resource Description
Framework
is one of the cornerstones of Semantic Web work.

the real value of RDF is the data model.
It defines a
very simple data model of triples (subject, predicate, object), where
subject and predicate are URIs, and the object is either a URI or a
literal. With this simple model, objects and their properties may be
represented.
RDF schemas differ somewhat from XML schemas (such as DTDs or W3C
XML Schemas) in that they do not define a permissible syntax but
instead classes, properties, and their interrelation: they operate
directly at the data model level, rather than the syntax level.
Scaled up over the Web, RDF schemas are a key technology, as they
allow machines to make inferences about the data collected from the
web.
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24th Jan 2008

Semantic Web Primer

clipped from www.xml.com
This is perhaps the best way of summing up
the Semantic Web — technologies for enabling machines to make more
sense of the Web, with the result of making the Web more useful for
humans.
Technical peeves aside, the value of the Semantic Web is to
solve real problems in communication. First and foremost this means
radically improving our ability to find, sort, and classify
information: an activity that takes up a large part of our time.

The Technologies


This section addresses some of the most important technologies for
constructing the Semantic Web.

XHTML and XSLT


Perhaps surprisingly, a powerful tool for the construction of the
Semantic Web is HTML itself or, more properly, XHTML.

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24th Jan 2008

Bill Hicks

clipped from www.billhicks.com
London snapshot

“Today a young man on acid realized that all

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20th Jan 2008

Color Meaning

ScribeFired from http://www.color-wheel-pro.com/color-meaning.html

Red Color  Red

Red is the color of fire and blood, so it is associated with energy, war, danger, strength, power, determination as well as passion, desire, and love.

Red is a very emotionally intense color. It enhances human metabolism, increases respiration rate, and raises blood pressure. It has very high visibility, which is why stop signs, stoplights, and fire equipment are usually painted red. In heraldry, red is used to indicate courage. It is a color found in many national flags.

Red brings text and images to the foreground. Use it as an accent color to stimulate people to make quick decisions; it is a perfect color for ‘Buy Now’ or ‘Click Here’ buttons on Internet banners and websites. In advertising, red is often used to evoke erotic feelings (red lips, red nails, red-light districts, ‘Lady in Red’, etc). Red is widely used to indicate danger (high voltage signs, traffic lights). This color is also commonly associated with energy, so you can use it when promoting energy drinks, games, cars, items related to sports and high physical activity.

Light red represents joy, sexuality, passion, sensitivity, and love.
Pink signifies romance, love, and friendship. It denotes feminine qualities and passiveness.
Dark red is associated with vigor, willpower, rage, anger, leadership, courage, longing, malice, and wrath.
Brown suggests stability and denotes masculine qualities.
Reddish-brown is associated with harvest and fall.


Orange Color  Orange

Orange combines the energy of red and the happiness of yellow. It is associated with joy, sunshine, and the tropics. Orange represents enthusiasm, fascination, happiness, creativity, determination, attraction, success, encouragement, and stimulation.

To the human eye, orange is a very hot color, so it gives the sensation of heat. Nevertheless, orange is not as aggressive as red. Orange increases oxygen supply to the brain, produces an invigorating effect, and stimulates mental activity. It is highly accepted among young people. As a citrus color, orange is associated with healthy food and stimulates appetite. Orange is the color of fall and harvest. In heraldry, orange is symbolic of strength and endurance.

Orange has very high visibility, so you can use it to catch attention and highlight the most important elements of your design. Orange is very effective for promoting food products and toys.

Dark orange can mean deceit and distrust.
Red-orange corresponds to desire, sexual passion, pleasure, domination, aggression, and thirst for action.
Gold evokes the feeling of prestige. The meaning of gold is illumination, wisdom, and wealth. Gold often symbolizes high quality.


Yellow Color  Yellow

Yellow is the color of sunshine. It’s associated with joy, happiness, intellect, and energy.

Yellow produces a warming effect, arouses cheerfulness, stimulates mental activity, and generates muscle energy. Yellow is often associated with food. Bright, pure yellow is an attention getter, which is the reason taxicabs are painted this color. When overused, yellow may have a disturbing effect; it is known that babies cry more in yellow rooms. Yellow is seen before other colors when placed against black; this combination is often used to issue a warning. In heraldry, yellow indicates honor and loyalty. Later the meaning of yellow was connected with cowardice.

Use yellow to evoke pleasant, cheerful feelings. You can choose yellow to promote children’s products and items related to leisure. Yellow is very effective for attracting attention, so use it to highlight the most important elements of your design. Men usually perceive yellow as a very lighthearted, ‘childish’ color, so it is not recommended to use yellow when selling prestigious, expensive products to men – nobody will buy a yellow business suit or a yellow Mercedes. Yellow is an unstable and spontaneous color, so avoid using yellow if you want to suggest stability and safety. Light yellow tends to disappear into white, so it usually needs a dark color to highlight it. Shades of yellow are visually unappealing because they loose cheerfulness and become dingy.

Dull (dingy) yellow represents caution, decay, sickness, and jealousy.
Light yellow is associated with intellect, freshness, and joy.


Green Color  Green

Green is the color of nature. It symbolizes growth, harmony, freshness, and fertility. Green has strong emotional correspondence with safety. Dark green is also commonly associated with money.

Green has great healing power. It is the most restful color for the human eye; it can improve vision. Green suggests stability and endurance. Sometimes green denotes lack of experience; for example, a ‘greenhorn’ is a novice. In heraldry, green indicates growth and hope. Green, as opposed to red, means safety; it is the color of free passage in road traffic.

Use green to indicate safety when advertising drugs and medical products. Green is directly related to nature, so you can use it to promote ‘green’ products. Dull, darker green is commonly associated with money, the financial world, banking, and Wall Street.

Dark green is associated with ambition, greed, and jealousy.
Yellow-green can indicate sickness, cowardice, discord, and jealousy.
Aqua is associated with emotional healing and protection.
Olive green is the traditional color of peace.


Blue Color  Blue

Blue is the color of the sky and sea. It is often associated with depth and stability. It symbolizes trust, loyalty, wisdom, confidence, intelligence, faith, truth, and heaven.

Blue is considered beneficial to the mind and body. It slows human metabolism and produces a calming effect. Blue is strongly associated with tranquility and calmness. In heraldry, blue is used to symbolize piety and sincerity.

You can use blue to promote products and services related to cleanliness (water purification filters, cleaning liquids, vodka), air and sky (airlines, airports, air conditioners), water and sea (sea voyages, mineral water). As opposed to emotionally warm colors like red, orange, and yellow; blue is linked to consciousness and intellect. Use blue to suggest precision when promoting high-tech products.

Blue is a masculine color; according to studies, it is highly accepted among males. Dark blue is associated with depth, expertise, and stability; it is a preferred color for corporate America.

Avoid using blue when promoting food and cooking, because blue suppresses appetite. When used together with warm colors like yellow or red, blue can create high-impact, vibrant designs; for example, blue-yellow-red is a perfect color scheme for a superhero.

Light blue is associated with health, healing, tranquility, understanding, and softness.
Dark blue represents knowledge, power, integrity, and seriousness.


Purple Color  Purple

Purple combines the stability of blue and the energy of red. Purple is associated with royalty. It symbolizes power, nobility, luxury, and ambition. It conveys wealth and extravagance. Purple is associated with wisdom, dignity, independence, creativity, mystery, and magic.

According to surveys, almost 75 percent of pre-adolescent children prefer purple to all other colors. Purple is a very rare color in nature; some people consider it to be artificial.

Light purple is a good choice for a feminine design. You can use bright purple when promoting children’s products.

Light purple evokes romantic and nostalgic feelings.
Dark purple evokes gloom and sad feelings. It can cause frustration.


White Color  White

White is associated with light, goodness, innocence, purity, and virginity. It is considered to be the color of perfection.

White means safety, purity, and cleanliness. As opposed to black, white usually has a positive connotation. White can represent a successful beginning. In heraldry, white depicts faith and purity.

In advertising, white is associated with coolness and cleanliness because it’s the color of snow. You can use white to suggest simplicity in high-tech products. White is an appropriate color for charitable organizations; angels are usually imagined wearing white clothes. White is associated with hospitals, doctors, and sterility, so you can use white to suggest safety when promoting medical products. White is often associated with low weight, low-fat food, and dairy products.


Black Color  Black

Black is associated with power, elegance, formality, death, evil, and mystery.

Black is a mysterious color associated with fear and the unknown (black holes). It usually has a negative connotation (blacklist, black humor, ‘black death’). Black denotes strength and authority; it is considered to be a very formal, elegant, and prestigious color (black tie, black Mercedes). In heraldry, black is the symbol of grief.

Black gives the feeling of perspective and depth, but a black background diminishes readability. A black suit or dress can make you look thinner. When designing for a gallery of art or photography, you can use a black or gray background to make the other colors stand out. Black contrasts well with bright colors. Combined with red or orange – other very powerful colors – black gives a very aggressive color scheme.

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09th Jan 2008

SavjetLink - Portal za razmjenu savjeta

clipped from www.savjetlink.com

Besplatni savjeti o svemu i za svakoga.


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Savjetlink je zamišljen kao web portal otvorenog tipa na kojem će se sakupljati mudrost običnih ljudi. Svatko uči, ne samo iz vlastitih uspjeha i pogrešaka već i iz tuđih. Život je najbolja škola. Dobar savjet zlata vrijedi.

Što ti znaš? Imaš savjet, recept ili uputstvo za podijeliti sa svijetom? Ostavi trag u povijesti, daj svoj doprinos ljudskom znanju. Registriraj se besplatno i postani dio SavjetLinka!

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