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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
Operators
Order of operator evaluation

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

Order of operator evaluation

Use parentheses to group operations. Expressions within parentheses are evaluated before performing other operations. For example:

(UnitPrice - Discount) * Tax

The expression UnitPrice - Discount is evaluated before the rest of the expression.

Some operators are evaluated before others according to standard rules of precedence. Operators are evaluated in the following order:


Precedence	Operators	Description
first	( )	Operations within parentheses
second	+ and -	unary plus and minus The sign indicates a positive or negative expression, for example: - quantity*rate
third	=, <, >, <=, >=, !=	comparative operators
fourth	^	logical operator "exclusive or"
fifth	&	logical operator "and"
sixth	\|	logical operator "or"
seventh	* and /	multiplication and division
eighth	+ and -	addition and subtraction

Operators of equal precedence are evaluated left to right.