Parameter types used in geoprocessing widges are as follows:
GPBooleanCheck the check box to set the default value to true.
GPDoubleEnter a numeric value for the default or leave the field blank.
GPLongEnter a long integer value for the default or leave the field blank.
GPStringEnter a text value for the default or leave the field blank.
GPLinearUnitEnter a numeric value for the default or leave the field blank. Select a default unit of length.
GPFeatureRecordSetLayerChoose the symbol shown for the input or output features. Reference the Draw widget for the complete set of symbol options.
Note:
Currently, Web AppBuilder for ArcGIS does not support attributes for input features.
GPRecordSet
GPDateEnter a date and time value for the default or leave the fields blank.
GPDataFileAdd a URL or upload a file in the data field as the default or leave the field blank.
GPRasterDataThis parameter type is currently not supported by Web AppBuilder.
GPRasterDataLayer
GPMultiValue:GPParameterTypeThe interface displayed by the multi-value selector varies based on the parameter type. Click + to add a new default value or - to remove one.