Group Object

CDXML Name:group
CDX Constant Name:kCDXObj_Group
CDX Constant Value:0x8002
Contained by objects:kCDXObj_Page, kCDXObj_Group, kCDXObj_NamedAlternativeGroup
First written/read in:ChemDraw 4.0


A Group is a logical collection of objects. ChemDraw creates Group objects via the Group command in the Object menu. Groups are especially useful to associate otherwise-disjoint fragments, for example, an organic anion and the counterion that accompanies it.

ChemDraw 6.0.x and earlier do not support nested groups. Files containing nested groups (groups that contain other groups) will be flattened so that only the innermost groups are preserved. No objects will ever be lost in this case, just the hierarchical arrangement of the grouping.

A Group has no required objects or properties, but a Group without any objects is pretty useless.

Value Name CDXML Name
0x8002 kCDXObj_Group group
A logical collection of objects.
0x8003 kCDXObj_Fragment fragment
A collection of nodes and their connectivity (bonds).
0x8006 kCDXObj_Text t
An arbitrary block of (possibly styled) text.
0x8007 kCDXObj_Graphic graphic
A (generally non-chemical) graphic object such as a line, arc, circle, or rectangle.
0x8008 kCDXObj_Curve curve
A Bézier curve.
0x800A kCDXObj_NamedAlternativeGroup altgroup
A container object holding fragments that represent alternative substituents for a query.
0x800E kCDXObj_ReactionStep step
A description of one step in a reaction. It contains the constituents, conditions, and products.
0x8010 kCDXObj_Spectrum spectrum
An NMR, MS, IR or other sort of spectral plot.
0x8011 kCDXObj_ObjectTag objecttag
Arbitrarily named property, one or more of which can be attached to any ChemDraw object.

Value Name CDXML Name Type
n/a n/a id UINT16
A unique identifier for an object, used when other objects refer to it.
0x0204 kCDXProp_BoundingBox BoundingBox CDXRectangle
The smallest rectangle that encloses the graphical representation of the object.
0x1100 kCDXProp_Group_Integral Integral CDXBoolean
The group is considered to be integral (non-subdivisible) if non-zero.


CDX Documentation index