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External Data Source

Source

Regular Expression
(?=^.{1,160}$)^(?:(?<Workspace>(?<Root>(?:(?<Drive>[a-zA-Z]\:)|(?<Server>\\{2}[a-zA-Z]\w*)))(?<DirectoryTree>(?:\\(?<Directory>(?:(?![\w\.]*\.(?:gdb|mdb|sde|mdf))[^\\/:*?<>"| .]+[^\\/:*?<>"|]*[^\\/:*?<>"| .]+)))*)(?:\\(?<Geodatabase>(?<GDBName>[a-zA-Z]\w*)(?<Extension>\.(?:gdb|mdb|sde|mdf))))?)\\?(?<FeatureDataset>[a-zA-Z]\w*)?(?:\\(?<BaseName>[a-zA-Z]\w*(?:\.shp)?)(?<!.+\k<Extension>.+\.shp|(?<!.+\k<Extension>.+)(?<!.+\.shp))))$