Working with AutoCAD entities
Some entities are too complex to be stored in one entget,
- Entities such as non-lightweight polylines (all pre14 polylines) and block inserts with attributes will have a value of 1 associated with the 66 code, indicating that more data follows
- Use (entnext) to access the next item in the data base, which will be part of the 'main' entity
- All the following data will be associated with the 'main' entity until a SEQEND entity is encountered