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Reference Guide
This guide describes conceptual information about data design environment components when you want to use the data fabrication feature in HCL OneTest™ Server.
Schema design
A schema is a graphical data dictionary that contains metadata definitions of the structure of a document to generate test data. Schema provides visual cues for understanding the structure and complete definition of an object.
Functions and expressions
Expressions and evaluations
Evaluating expressions

Reference Guide
This guide describes conceptual information about data design environment components when you want to use the data fabrication feature in HCL OneTest™ Server.
- Files
  You add a file to a project to use it as input in the project. You can upload a file from your local file system to a project from the Files tab to generate test data. Alternatively, you can upload it when you define an action.
- Connections
  A connection defines the properties that are required to connect to an external resource. An action uses a connection to provide source data to a project or write data from a source to a target. Multiple actions can use the same connection. You can define both connections and actions at the project level.
- Schema design
  A schema is a graphical data dictionary that contains metadata definitions of the structure of a document to generate test data. Schema provides visual cues for understanding the structure and complete definition of an object.
  - Introduction to schema design
    Use the Schemas tab to define, modify, and view schemas. A schema describes the syntax, structure, and semantics of your data.
  - Type properties
    The properties of a type define the characteristics of the data objects of that type.
  - Item restrictions
    Item restrictions are an optional feature you can use to specify valid or invalid data objects for an item type. Item restrictions are grouped into three categories: Value, Character, and Range.
  - Components
  - Partitioning
  - Type inheritance
  - Schema analyzer
  - Distinguishable objects
  - Functions and expressions

Evaluating expressions

Expressions are evaluated based on the context in which data object names, literals, operators, function names and map names appear in the expression, and the data on which it operates. A component rule always evaluates once for each occurrence of a component. A map rule can evaluate many times.

When a map rule evaluates, the map designer selects an evaluation set of values and then evaluates the rule. Then it selects another evaluation set of values, if there is one, and evaluates the rule again. This continues until all the different evaluation sets have been used.

The same number of evaluations is always produced, but output objects can be ordered differently, depending on how you define your map.

For a selected evaluation set, a particular instance of a rule is evaluated using parentheses, operator precedence rules, and left-to-right precedence rules to get one result.