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## Specific Attribute Types

Here is a brief overview of complex attribute types. These attribute types are common for various groups of components.

Links to corresponding sections follow:

- When you need to specify some file in a component, you need to use URL File Dialog.

- Some components use a specific metadata structure on their ports. The connected edges can be easily assigned metadata from predefined templates. See Metadata Templates.

- Some components can be configured with a time interval (usually a delay or a timeout). See Time Intervals for an overview of the syntax of time interval specification.

- In some of the components, records must be grouped according to the values of a group key. In this key, neither the order of key fields nor the sort order are of importance. See Group Key.

- In some of the components, records must be grouped and sorted according to the values of a sort key. In this key, both the order of key fields and the sort order are of importance. See Sort Key.

- In many components from different groups of components, a transformation can be or must be defined. See Defining Transformations.

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