diff -ur v31/ezmd.py v32/ezmd.py
--- v31/ezmd.py	2019-10-12 16:46:42.000000000 +0900
+++ v32/ezmd.py	2019-10-13 02:24:13.000000000 +0900
@@ -6,7 +6,7 @@
 import nkf
 
 heads = [ 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'h7', 'h8', 'h9' ]
-modes = heads + [ 'p', 'pre', 'ul', 'dl', 'tbl', 'index', 'swbuf' ]
+modes = heads + [ 'p', 'pre', 'ul', 'dl', 'tbl', 'index', 'swbuf', 'macro' ]
 
 is_all_ge_n = lambda s, c, n: all( map( lambda c_: c_ == c, s ) ) and len(s) >= n
 
@@ -589,7 +589,35 @@
 
 	outbuf.append( tbls_join( outbuf.pop_tmp() ) )
 
+macro_dic = {}
+
+def do_macro(buf):
+	for (k, v) in macro_dic.items():
+		def f(s):
+			if k in s:
+				if is_str(v):
+					return s.replace(k, v)
+				if is_lst(v):
+					lst = list( map( lambda a: [a] if a else [], s.split(k) ) )
+					return sum( map( lambda b: b+v, lst[:-1] ), [] ) + lst[-1]
+			return s
+		buf = flat_map(f, buf)
+	return buf
+
 def do_mode(mode, buf, hd_names):
+	if mode == 'macro':
+		d = yaml.load( '\n'.join(buf) )
+		if type(d) == dict:
+			cv = lambda o: list( map(cv, o) ) if is_lst(o) else str(o)
+			d = dict( map( lambda kv: list( map(cv, kv) ), d.items() ) )
+			macro_dic.update(d)
+			d = dict( filter( lambda kv: kv[0] != kv[1], macro_dic.items() ) )
+			macro_dic.clear()
+			macro_dic.update(d)
+		return		
+	if mode != 'pre':
+		buf = do_macro(buf)
+
 	if mode in heads:
 		buf = lst_strip(buf)
 		buf = cut_empty(buf)