The expression evaluator supports the following symbol-handling function. The words in italics can be replaced by an actual value or a variable.
| Expression | Description |
|---|---|
| (not item) | Verifies that the item evaluates to nil. |
- What's New in Civil 3D
- Release Notes
- Help
- Drainage Design and Analysis Tools
- Tutorials
- Best Practices Guide
- Have You Tried
- Subassembly Reference
- Subassembly Composer Help
- Project Explorer Help
- IFC 4.3 Extension for Autodesk Civil 3D
- Geotechnical Modeler (In English Only)
- Dynamo for Civil 3D
- Survey and Transform Tools for Coordinate Geometry (in English only)
- Autodesk SHP Import/Export Utility Help (in English only)
- Infrastructure Content Authoring
- Content Browser Help
- Object Enabler Help
- CAiCE Translator Help
- API Reference Guide
- Developer's Guide
- Learn AutoCAD Map 3D
- Use AutoCAD Map 3D
- Annotation
- Attached Drawings
- Buffers / Overlays
- CAD Manager Tasks
- Classification
- Cleanup
- Coordinate Geometry (COGO)
- Coordinate Systems
- Data Sources
- Data Table
- Data View
- Digitizing
- Display Manager
- Editing (DWG Objects)
- Editing (Features)
- Export
- Features (Creating)
- Grid Data Files and Datum Shifts
- Images (Data Connect)
- Images (Inserted)
- Import (Data Connect)
- Import (DWG Objects)
- Industry Models
- Joins
- Layouts
- Link Templates
- Map Books
- Measurements
- Metadata
- Object Data
- Point Clouds
- Polygons
- Publishing
- Queries
- Queries (Executing)
- Schemas
- Styling (Drawing Layers)
- Styling (Features)
- Surfaces
- Survey Data
- Themes
- Topologies (Analyzing)
- Topologies (Creating)
- Topologies (Managing)
- Topologies (Editing)
- Workflows
- Reference Help
- Expression Builder
- Glossary
- Customize AutoCAD Map 3D
- AutoCAD User's Guide
- Customization and Administration Guides
- AutoLISP: Developer's Guide
- AutoLISP: Reference
- Autodesk Civil 3D Installation