@rurban 
All dimensions in preR13 are one entity, which has special flag inside which differentiate dimension types.

Structure of dimension is:
```
flag_r11
entity_size
layer_index
opts_r11 (2 bytes, probably better is to use two flags)
... <------- elevation, thickness, handle, paper if flag_r11 flags
block_index
def_pt
text_midpt
flag1 <------ dimension type
// Other is defined by opts_r11 flags
```
Parsing of preR13 dimensions
This is a GitHub Issue
repo:libredwg
owner:LibreDWG
Title : Parsing of preR13 dimensions
Issue date:

--- start body ---
@rurban 
All dimensions in preR13 are one entity, which has special flag inside which differentiate dimension types.

Structure of dimension is:
```
flag_r11
entity_size
layer_index
opts_r11 (2 bytes, probably better is to use two flags)
... <------- elevation, thickness, handle, paper if flag_r11 flags
block_index
def_pt
text_midpt
flag1 <------ dimension type
// Other is defined by opts_r11 flags
```
--- end body ---
