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Webtags/Parameters: Difference between revisions
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= Introduction = | = Introduction = | ||
Using a Webtag is described on the [[Webtags#Using_Webtags|Webtag]] page. Only the GET API interface can't use parameters. All the other possibilities use the general Webtag format: | |||
<#tag_name [optional input selection parameters] [optional output modification parameters]> | <#tag_name [optional input selection parameters] [optional output modification parameters]> | ||
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In the following the input and output parameters are described. | In the following the input and output parameters are described. | ||
# An input parameter is used where the same tag name can represent a value for a number of different past time instants. Each of those past time instants is represented by a different value for the input parameter. So a combination of a tag name and input modification parameter lets CumulusMX select the value you want to see. Whether a particular tag name can use input modification parameters will be shown in the Full list of Webtags. | # An input parameter is used where the same tag name can represent a value for a number of different past time instants e.g. temperature for several days or several hours ago. Each of those past time instants is represented by a different value for the input parameter. So a combination of a tag name and input modification parameter lets CumulusMX select the value you want to see. Whether a particular tag name can use input modification parameters will be shown in the Full list of Webtags. | ||
# An output parameter is used when a particular tag name can be fed through a process that alters how the output is shown: | # An output parameter is used when a particular tag name can be fed through a process that alters how the output is shown: | ||
#* Tag names representing integer values cannot have their output format modified | #* Tag names representing integer values cannot have their output format modified | ||