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Term
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Definition
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Alias
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a short, user-defined name representing an ADDE dataset name; for example, the alias GV1 might represent the dataset name SSEC-RT/GOES-1KVIS
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Client
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workstation receiving and displaying data
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Dataset
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collection of one or more files with a common format; for example, one dataset may consist of areas 101 to 104, another dataset may consist of MD files 1 to 10
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Dataset Name
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name used by ADDE to reference a dataset; the dataset name consists of a group name and a descriptor name separated by a slash ( / ); for example, SSEC-RT/GOES-1KVIS
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Descriptor
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name used to reference a dataset; for example, a dataset of areas 105 to 108 containing GOES visible data at 4 km resolution might have the descriptor GOES-VIS-4K
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File Number
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number used to reference a McIDAS format file (the standard McIDAS numbering scheme)
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Format
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file format; McIDAS formats include area, grid and MD; non-McIDAS formats include HDF and netCDF
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Group
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name used to reference a collection of descriptors; used by the client to determine which server should receive data requests
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Position
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absolute or time-relative position of a file in a dataset; position numbers greater than zero represent an absolute position in the dataset; position numbers less than or equal to zero represent a relative position, 0 is the most recent and -1 is the next most recent; for example, if a dataset has four images with times 13 UTC, 14 UTC, 15 UTC and 12 UTC, they have the positions -2, -1, 0 and -3
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Server
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machine storing and supplying data
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Type
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data type: image, grid, point, navigation, or text
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