Added "resist ... None" entries in the extract section of the magic
techfile to ensure that "comment" and other similar layer types are
not extracted as nodes in the extraction output.

VERSION

diff --git a/VERSION b/VERSION
index 0eb194e..744b432 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.0.197
+1.0.198

sky130/magic/sky130.tech

diff --git a/sky130/magic/sky130.tech b/sky130/magic/sky130.tech
index acfe41e..9a66a66 100644
--- a/sky130/magic/sky130.tech
+++ b/sky130/magic/sky130.tech
@@ -456,6 +456,10 @@
   allpad	padl
 
   psub		pwell
+
+  obstypes	obswell,obsactive,obsli,obsmcon,obsm1,obsm2,obsm3,obsm4,obsm5,obsmrdl,obscomment
+  idtypes	res0p35,res0p69,res1p41,res2p85,res5p73,pnp0p68,pnp3p40,npn1p00,npn2p00,npn11p0
+  blocktypes	fillblock,fillblock4
   
 end
 
@@ -5043,6 +5047,12 @@
  resist mrdl/metali		     5
 #endif (REDISTRIBUTION)
 
+ # These types should not be considered as electrical nodes
+ resist blocktypes	 	 None
+ resist obstypes	 	 None
+ resist idtypes	 	 	 None
+ resist comment	 	 	 None
+
  contact ndc,nsc		 15000
  contact pdc,psc		 15000
  contact mvndc,mvnsc		 15000