REVIT SYSTEM PARAMETERS
These are built into Revit and can not be altered.
Generally they are sentence case literal names. The point in having naming schema for other types of parameters is to distinguish them from built in parameters.
e.g.
Width
Model
Comment
FAMILY PARAMETERS
Family parameters are that are created within a family file, but are available in a project to make changes to the family.
Family parameters can't be scheduled or appear in tags, for this you have to use Shared Parameters or Revit parameters.
FORMAT:
Major-medius-minor structure.
e.g.
Use CamelCase for parameters not designed to be altered by users (i.e. formula driven, or driving, parameters).
e.g.
WidthClear
WidthClearOpening
ShowWheels
SHARED PARAMETERS
Shared parameters are sourced from a shared parameter file. They have a Global Unique ID (GUID) that makes each one unique.
Revit recognizes parameters by ID, not the name you give it, so it is possible to have more than one parameter with identical names.
Shared parameters can be used in family files, or introduced into the project as Project Parameters.
They can appear in schedules and tags.
The reason for the name format is so that shared parameters can be recognized, and the category they apply to is identifiable. This can be important in multi-category schedules.
FORMAT:
Major-medius-minor structure.
Prefix with 1 to 3 uppercase characters identifying the shared parameter source, followed by underscore.
Suffix of full stop plus two uppercase letters describing category or grouping.
e.g.
A_Width Clear.DO
A_Acoutic Rating.RM
A_Drg Series.VW
A_Area Briefed.AR
PROJECT PARAMETERS
Project parameters are added to all objects on the categories selected when creating the parameter. Any subsequent new families of the same category added to the project will also be given the project parameter.
Project parameters can appear in schedules but not in tags. As they behave differently is is important they be identified.
Note it is generally it is better to use a Shared Parameter.
FORMAT:
Prefix with 2 or 3 uppercase characters identifying your office, followed by underscore.
Suffix of full stop plus two uppercase letters describing category or grouping.
e.g.
JWA_Latch.DO
JWA_Latch.WI
JWA_Hinges.FFE
SCHEDULE PARAMETERS
Calculated Value parameters can be created that only appear in schedules. These parameters are driven by other parameters or can be static.
FORMAT:
Prefix with a full stop. (Note heading name in the schedule can be changed to something else).
e.g.
.Rack count
.Clearance Area