Glossary/Plant3D
Asset (Plant3D)
A piece of plant equipment — a valve, pipe run, fitting or instrument — modeled as a Plant3D-specific object, not a plain block.
In Plant3D, an asset (a valve, pump, piece of pipe, instrument, etc.) is its own object type built on top of AutoCAD's engine — it isn't a plain block reference, even though it's placed and displayed similarly. Assets belong to asset classes (e.g. A_BallValve) and carry structured properties, some stored on the drawing entity and some — the custom ones — stored only in the Plant3D project database.
This is the most common point of confusion for anyone coming from plain AutoCAD: a tool built for block references (attributes on ordinary blocks) can't read or write Plant3D asset data, and vice versa — they're different object models, which is why CADXChange ships block-focused and Plant3D-focused tools as separate products.
P3DSync
BlockSync