documented DXF attributes for BLOCK
@@ -62,6 +62,29 @@ Block Definition
Blocks are embedded into the :class:`BlockLayout` object.
+=========== ===========
+DXFAttr Description
+=========== ===========
+name block name
+name2 block name
+base_point defines the base point of the block, default = (0, 0, 0)
+flags block flags, see below (bit-coded)
+xref_path xref path name
+=========== ===========
+
+=========== ===========
+Block Flags Description
+=========== ===========
+1 Anonymous block generated by hatching, associative dimensioning, other internal operations, or an application
+2 Block has non-constant attribute definitions (this bit is not set if the block has any attribute
+ definitions that are constant, or has no attribute definitions at all)
+4 Block is an external reference (xref)
+8 Block is an xref overlay
+16 Block is externally dependent
+32 This is a resolved external reference, or dependent of an external reference (ignored on input)
+64 This definition is a referenced external reference (ignored on input)
+=========== ===========
+
Block Reference
===============
