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Reference
Find details on the SPL language, toolkits, APIs, commands, and more.
Toolkits
A toolkit is a set of SPL artifacts, which are organized into a package. Toolkits make SPL or native functions and primitive or composite operators reusable across different applications.
Toolkits
Toolkit com.teracloud.streams.timeseries 7.0.0
Time series
Univariate time series

Welcome
Learn about the core capabilities of Teracloud® Streams, its architecture, and key concepts.
Installing
Use this information to install, upgrade, and uninstall the Teracloud® Streams product.
Configuring
Create a basic or an enterprise domain which is a single point for configuring and managing common resources, security, and instances.
Administering
Administer the product by using the Teracloud® Streams graphical user interface, APIs, or the streamtool command-line interface.
Developing
Develop stream applications with the Streams Processing Language (SPL), Java, and Python.
Troubleshooting
Resolve problems with Teracloud® Streams using the troubleshooting tools provided with the product as well as the resources offered by Teracloud Support.
Reference
Find details on the SPL language, toolkits, APIs, commands, and more.
- APIs
  Application programming interfaces (APIs) provide functions that simplify applications development.
- Job configuration overlays
  You can specify or change configuration parameters when you use the submitjob or updateoperators operations. The settings control submission constraints, host constraints and locations, and operator status. Parameters are captured and updated in the configuration JSON file. When you change the values in the job configuration overlay file, the changes override any previously set values.
- Commands
  Teracloud® Streams provides a number of commands you use to perform tasks.
- Operator model
  An operator model is an XML document that describes the basic properties of a primitive operator.
- Streams Processing Language (SPL)
  Streams Processing Language (SPL) is a distributed data flow composition language that is used in Teracloud® Streams. SPL has primitive types, program structures, and definitions that are tailored for streaming data.
- Toolkits
  A toolkit is a set of SPL artifacts, which are organized into a package. Toolkits make SPL or native functions and primitive or composite operators reusable across different applications.
  - Specialized toolkit requirements and restrictions
    Several of the specialized toolkits require RPMs that are not required by the Teracloud® Streams product. There are also toolkit restrictions on some platforms.
  - Toolkits
- SPLDOC markup
  You can use SPLDOC markup in the descriptions associated with the SPL artifacts in a toolkit. The spl-make-doc command generates HTML documentation from the marked up artifacts.
Glossary
Use this glossary to find terms and definitions for Teracloud® Streams.

Univariate time series

A univariate time series is a sequence of scalar data that represents the evolution of a single numerical variable over time. For example, the daily temperature in New York can be a univariate time series.

Univariate time series can be represented in various schemas in the TimeSeries Toolkit. All operators in the TimeSeries Toolkit support the following two schemas for univariate time series:

tuple<float64 value>
- The tuple contains one scalar value and implicit timestamp information. The time series is assumed to be a regular time series.
tuple<timestamp time, float64 value>
- The tuple contains one scalar value and explicit timestamp information.

Some operators in the TimeSeries Toolkit optionally support the following schemas for univariate time series:

tuple<list<float64> values>
- The tuple contains a window that represents a finite temporal sequence of scalar values with implicit timestamps.
tuple<list<timestamp> times, list<float64> values>
- The tuple contains a window that represents a finite temporal sequence of scalar values, which is associated with timestamps. The list of timestamps and the list of values are the same size. Each index in the timestamp list corresponds to the timestamp of the value in the same index position of the values list.