|Product Name||Tree (Eyewitness Lvg Earth Video)|
|Category||Book / Magazine / Publication|
|Amazon.com||Buy on Amazon ~ 0789407264|
|Price New||999.11 US Dollars (curriencies)|
|Price Used||3.78 US Dollars (curriencies)|
|Width||1.11 inches (convert)|
|Height||7.49 inches (convert)|
|Length||4.02 inches (convert)|
|Long Description||Perhaps it is because they appear to be so still and silent that we take the tree for granted, but as we learn in Dorling Kindersley's Eyewitness Video: Trees, they are anything but still-- they are alive with constant motion. Although thankfully they still cover half of the planet's land mass, trees used to cover four-fifths. Trees are a constant oxygen factory. The very thing we need to survive is merely a byproduct of trees as they take in the carbon-dioxide we produce and convert it to oxygen which we inhale. This fascinating video defines what makes a tree a tree (a single stem, the ability to make wood and, usually, height) and differentiates them from other plant life. If trees could speak our language they would have incredible stories to tell, the oldest living thing on Earth today is a tree, but they can speak silently in death as their rings reveal periods of growth and harsher times. At any given time a single tree is crawling with life, often acting like a hotel for animals, birds and insects. Plenty of unwanted guests can harm trees such as woodpeckers, termites and the mistletoe plant. Many questions are answered in this thirty-minute video: what causes leaves to change color; do trees hibernate; what is the biggest tree and what is the smallest; what is tree farming; and, sadly, what are the effects of deforestation. Ancient mythology often centers around a "tree of life" and in the Garden of Eden, a tree is where man sought knowledge. As we learn over the running time of this video, not only do we use trees as a natural resource for lumber for homes and ships, they provide us with some of the ingredients for art and culture: paper, pencils (and erasers), and musical instruments. Trees also provide medicine, the treatment for world's greatest killer, malaria, comes from the bark of a tree. This insightful addition to the Eyewitness series will give viewers a whole new respect for trees, not only for the resources they provide, but for their greatest gift we take for granted: beauty. We need to be responsible in how we use trees, because if we callously threaten their very existence, they will eventually threaten our own.|
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The attributes are somewhat like fields. They are the individual data items that describe each product. Each product entry will have several attributes. There is no telling which attributes will be attached to each product but they all have the same basic format.
Here is an example of one attribute. When accessing the data feed API, you can get your data in XML or JSON format. Here it is displayed in XML format to make it a little easier to read through.
<attribute> <field_name>product</field_name> <group_name>Over View</group_name> <title>Product Name</title> <data_type>varchar</data_type> <data_type_description>short text</data_type_description> <has_linked_text>0</has_linked_text> <has_linked_extra>0</has_linked_extra> </attribute>
In the above example you will find these elements:
- field_name - The unique name used to access this attribute.
- group_name - The name of the data group this field belongs to.
- title - The label we place on the screen when displaying this attribute to users.
- data_type - The database data type we are using to store this attribute.
- data_type_description - More infomation about the data type.
- has_linked_text - Some numeric fields have a text representation. We store the numeric value but if there is linked text, we use a lookup table to display that text instead of the number to the user.
- has_linked_extra - Some numeric fields have an extra text value that goes along with the number. We use a lookup table to display that text in addition to the number.
Hopefully, this helps you understand the data attributes you find in the data feed API.