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2.18 Attribute extern

The attribute extern is available for all observation types, including <vector extern="..."> and <coordinates extern="...">. Its values have no impact on processing in gama-local, it only transferes the attribute values from XML input into the corresponing XML tags in the adjustment output.

The attribude extern="value" is provided to enable storing observations’ database keys from an external database system in gama-local XML adjutement input and output. If you do not have such an external application, you probably will not need this attribute.

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