Overview of Virtual Streams

Virtual Streams are created by applying computational transformations to the output values of a parent stream. These transformations generate a new stream—called a virtual stream—which is nested under the parent stream in the Sites Tree.

• Parent Stream Output Values: The final values in the Samples Table of the parent stream.

• Virtual Stream Output Values: The results of the transformations applied to the parent stream or a previous virtual stream.

Parent Stream

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Key Features

1. Applicability

   • Commonly used with "Level" type streams but can be applied to other stream types.

2. Successive Transformations

   • You can apply multiple transformations in stages, creating a hierarchy of virtual streams.

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Stages of Transformation

Stage 1

• Apply a linear transformation formula to the raw values of the parent stream.

• Optionally, limit samples to filter out unwanted data.

• Resulting values become the parent stream’s output values.

  • If no transformation is applied, output values remain identical to raw values.

Stage 2

• Apply a data transformation formula to the output values of Stage 1.

• Four available transformation methods can be used (details provided elsewhere).

• Results are displayed in a virtual stream nested under the parent stream.

Parent Stream

Stage 3

• Apply another transformation to the output values of Stage 2.

• Results are displayed in a new virtual stream nested under the previous virtual stream.

Parent Stream

Stage 4 and Beyond

• Continue applying transformations to the output values of the previous stage.

• Each transformation creates a new virtual stream nested under its predecessor.