diff --git a/src/context/lex/lex.go b/src/context/lex/lex.go
new file mode 100644
index 00000000..e7e776fc
--- /dev/null
+++ b/src/context/lex/lex.go
@@ -0,0 +1,382 @@
+package lex // {{{
+// }}}
+import ( // {{{
+	"context"
+	"fmt"
+	"strconv"
+)
+
+// }}}
+
+type State struct {
+	star bool
+	next int
+	hash int
+}
+
+type Seed struct {
+	page int
+	hash int
+	word string
+}
+
+type LEX struct {
+	page int
+	cell int
+
+	seed []*Seed
+
+	mat []map[byte]*State
+	M   *ctx.Message
+	*ctx.Context
+}
+
+func (lex *LEX) train(page int, hash int, seed []byte) { // {{{
+
+	s := []int{page}
+	c := make([]byte, 0, lex.cell)
+	cn := make([]bool, lex.cell)
+	sn := make([]bool, len(lex.mat))
+	ends := make([]*State, 0, len(seed))
+
+	for p := 0; p < len(seed); p++ {
+		switch seed[p] {
+		case '[':
+			p++
+			set := true
+			if seed[p] == '^' {
+				set = false
+				p++
+			}
+
+			for ; seed[p] != ']'; p++ {
+				if seed[p] == '\\' {
+					p++
+					cn[seed[p]] = true
+					continue
+				}
+
+				if seed[p+1] == '-' {
+					begin, end := seed[p], seed[p+2]
+					if begin > end {
+						begin, end = end, begin
+					}
+					for i := begin; i <= end; i++ {
+						cn[i] = true
+					}
+					p += 2
+				}
+
+				cn[seed[p]] = true
+			}
+
+			for i := 0; i < len(cn); i++ {
+				if (set && cn[i]) || (!set && !cn[i]) {
+					c = append(c, byte(i))
+				}
+				cn[i] = false
+			}
+
+		case '.':
+			for i := 0; i < lex.cell; i++ {
+				c = append(c, byte(i))
+			}
+		case '\\':
+			p++
+			fallthrough
+		default:
+			c = append(c, seed[p])
+		}
+
+		lex.M.Log("debug", "page: %v", s)
+		lex.M.Log("debug", "cell: %v", c)
+
+		flag := '\000'
+		if p+1 < len(seed) {
+			flag = rune(seed[p+1])
+			switch flag {
+			case '+', '*', '?':
+				p++
+			}
+		}
+
+		for i := 0; i < len(s); i++ {
+			line := 0
+			for j := byte(0); int(j) < len(c); j++ {
+				si := s[i]
+
+				begin, end := j, j+1
+
+				if false && flag == '+' {
+					if lex.mat[si][c[j]] == nil {
+						lex.mat[si][c[j]] = new(State)
+					}
+					state := lex.mat[si][c[j]]
+					lex.M.Log("debug", "GET(%d,%d) state:%v", si, c[j], state)
+
+					if state.next == 0 {
+						sn = append(sn, false)
+						state.next = len(lex.mat)
+						lex.mat = append(lex.mat, make(map[byte]*State))
+					}
+					if p == len(seed)-1 {
+						state.hash = hash
+					}
+					ends = append(ends, state)
+					lex.M.Log("debug", "SET(%d,%d) state:%v", si, c[j], state)
+
+					si = state.next
+					begin, end = byte(0), byte(len(c))
+				}
+
+				next := true
+
+				for j := begin; j < end; j++ {
+
+					if lex.mat[si][c[j]] == nil {
+						lex.mat[si][c[j]] = new(State)
+					}
+					state := lex.mat[si][c[j]]
+					lex.M.Log("debug", "GET(%d,%d) state:%v", si, c[j], state)
+
+					switch flag {
+					case '+', '*':
+						state.star = true
+						fallthrough
+					case '?':
+						sn[si] = true
+						if p < len(seed)-1 {
+							break
+						}
+
+						for _, s := range ends {
+							if s.next == si && s.hash == 0 {
+								lex.M.Log("debug", "GET() state:%v", s)
+								s.hash = hash
+								lex.M.Log("debug", "END() state:%v", s)
+							}
+						}
+						fallthrough
+					case '\000':
+						next = false
+					}
+
+					if next {
+						if state.next == 0 {
+							if line == 0 {
+								sn = append(sn, false)
+								line = len(lex.mat)
+								lex.mat = append(lex.mat, make(map[byte]*State))
+							}
+							state.next = line
+						}
+						sn[state.next] = true
+					} else {
+						state.hash = hash
+					}
+					ends = append(ends, state)
+					lex.M.Log("debug", "SET(%d,%d) state:%v", si, c[j], state)
+				}
+			}
+		}
+
+		c = c[:0]
+		s = s[:0]
+		for i := 0; i < len(sn); i++ {
+			if sn[i] {
+				s = append(s, i)
+			}
+			sn[i] = false
+		}
+	}
+}
+
+// }}}
+func (lex *LEX) parse(page int, line []byte) (word []byte, hash int, rest []byte) { // {{{
+
+	s := page
+	star := 0
+
+	begin, end := 0, 0
+
+	for i := 0; s != 0 && i < len(line); i++ {
+		c := line[i]
+		if c == '\\' && i < len(line)-1 {
+			c = 'a'
+			end++
+			i++
+		}
+
+		state := lex.mat[s][c]
+		lex.M.Log("debug", "(%d,%d): %v", s, c, state)
+		if state == nil && star != 0 {
+			s, star = star, 0
+			state = lex.mat[s][c]
+			lex.M.Log("debug", "(%d,%d): %v", s, c, state)
+		}
+		if state == nil {
+			break
+		}
+
+		if state, ok := lex.mat[star][c]; star == 0 || !ok || state == nil || !state.star {
+			star = 0
+		}
+
+		end++
+		hash = state.hash
+		if state.star {
+			star = s
+		}
+
+		s = state.next
+		if s == 0 {
+			s, star = star, 0
+		}
+	}
+
+	if hash == 0 {
+		begin, end = 0, 0
+	}
+
+	word = line[begin:end]
+	rest = line[end:]
+	lex.M.Log("debug", "%d %v %v", hash, word, rest)
+
+	return
+}
+
+// }}}
+
+func (lex *LEX) Begin(m *ctx.Message, arg ...string) ctx.Server { // {{{
+	lex.Configs["page"] = &ctx.Config{Name: "词法集合", Value: "16", Help: "词法集合"}
+	lex.Configs["cell"] = &ctx.Config{Name: "字符集合", Value: "128", Help: "字符集合"}
+
+	if len(arg) > 0 {
+		lex.Configs["page"].Value = arg[0]
+	}
+	if len(arg) > 1 {
+		lex.Configs["cell"].Value = arg[1]
+	}
+
+	return lex
+}
+
+// }}}
+func (lex *LEX) Start(m *ctx.Message, arg ...string) bool { // {{{
+	lex.M = m
+
+	lex.page = m.Confi("page")
+	lex.cell = m.Confi("cell")
+
+	lex.mat = make([]map[byte]*State, m.Confi("page"))
+
+	for i := 0; i < len(lex.mat); i++ {
+		lex.mat[i] = make(map[byte]*State)
+	}
+	lex.seed = make([]*Seed, 0, 10)
+
+	return true
+}
+
+// }}}
+func (lex *LEX) Spawn(c *ctx.Context, m *ctx.Message, arg ...string) ctx.Server { // {{{
+	c.Caches = map[string]*ctx.Cache{}
+	c.Configs = map[string]*ctx.Config{}
+
+	s := new(LEX)
+	s.Context = c
+	return s
+}
+
+// }}}
+func (lex *LEX) Exit(m *ctx.Message, arg ...string) bool { // {{{
+	return true
+}
+
+// }}}
+
+var Index = &ctx.Context{Name: "lex", Help: "词法解析",
+	Caches: map[string]*ctx.Cache{},
+	Configs: map[string]*ctx.Config{
+		"page": &ctx.Config{Name: "词法集合", Value: "16", Help: "词法集合"},
+		"cell": &ctx.Config{Name: "字符集合", Value: "128", Help: "字符集合"},
+	},
+	Commands: map[string]*ctx.Command{
+		"train": &ctx.Command{Name: "train seed [hash [page]", Help: "添加词法规则", Hand: func(c *ctx.Context, m *ctx.Message, key string, arg ...string) string {
+			lex, ok := m.Target.Server.(*LEX) // {{{
+			if !ok {
+				return ""
+			}
+			hash := 1
+			if len(arg) > 1 {
+				hash, _ = strconv.Atoi(arg[1])
+			}
+			page := 1
+			if len(arg) > 2 {
+				page, _ = strconv.Atoi(arg[2])
+			}
+			lex.train(page, hash, []byte(arg[0]))
+			lex.seed = append(lex.seed, &Seed{page, hash, arg[0]})
+
+			return ""
+			// }}}
+		}},
+		"parse": &ctx.Command{Name: "parse line [page]", Help: "解析单词", Hand: func(c *ctx.Context, m *ctx.Message, key string, arg ...string) string {
+			lex, ok := m.Target.Server.(*LEX) // {{{
+			if !ok {
+				return ""
+			}
+
+			page := 1
+			if len(arg) > 1 {
+				page, _ = strconv.Atoi(arg[1])
+			}
+
+			word, hash, rest := lex.parse(page, []byte(arg[0]))
+			m.Echo(string(word))
+			m.Echo(fmt.Sprintf("%d", hash))
+			m.Echo(string(rest))
+			m.Log("debug", "%s %d %s", string(word), hash, string(rest))
+			return ""
+			// }}}
+		}},
+		"split": &ctx.Command{Name: "split line [page1 [page2]]", Help: "分割语句", Hand: func(c *ctx.Context, m *ctx.Message, key string, arg ...string) string {
+			lex, ok := m.Target.Server.(*LEX) // {{{
+			if !ok {
+				return ""
+			}
+
+			line := arg[0]
+			page1 := 1
+			page2 := 2
+			if len(arg) > 1 {
+				page1, _ = strconv.Atoi(arg[1])
+			}
+			if len(arg) > 2 {
+				page2, _ = strconv.Atoi(arg[2])
+			}
+
+			for len(line) > 0 {
+				word, hash, rest := lex.parse(page1, []byte(line))
+				m.Log("debug", "\033[31mvoid [%s]\033[0m\n", string(word))
+				line = string(rest)
+
+				word, hash, rest = lex.parse(page2, []byte(line))
+				m.Log("debug", "\033[31mword [%s]\033[0m\n", string(word))
+				if hash == 0 {
+					break
+				}
+				m.Echo(string(word))
+				line = string(rest)
+			}
+			return ""
+			// }}}
+		}},
+	},
+}
+
+func init() {
+	lex := &LEX{}
+	lex.Context = Index
+	ctx.Index.Register(Index, lex)
+}
diff --git a/src/context/lex/lex_test.go b/src/context/lex/lex_test.go
new file mode 100644
index 00000000..45cc6fe8
--- /dev/null
+++ b/src/context/lex/lex_test.go
@@ -0,0 +1,150 @@
+package lex
+
+import (
+	"context"
+	"testing"
+)
+
+func TestLEX(t *testing.T) {
+
+	m := ctx.Pulse.Spawn(Index)
+	seed := map[string]map[string]string{
+	// "shy?": map[string]string{
+	// 	"s":     "",
+	// 	"sh":    "sh",
+	// 	"she":   "sh",
+	// 	"shy":   "shy",
+	// 	"shyyy": "shy",
+	// },
+	// "shy*": map[string]string{
+	// 	"s":     "",
+	// 	"sh":    "sh",
+	// 	"she":   "sh",
+	// 	"shy":   "shy",
+	// 	"shyyy": "shyyy",
+	// },
+	// "shy+": map[string]string{
+	// 	"s":     "",
+	// 	"sh":    "",
+	// 	"she":   "",
+	// 	"shy":   "shy",
+	// 	"shyyy": "shyyy",
+	// },
+	// "s?hy": map[string]string{
+	// 	"s":   "",
+	// 	"sh":  "",
+	// 	"she": "",
+	// 	"shy": "shy",
+	// 	"hy":  "hy",
+	// },
+	// "s*hy": map[string]string{
+	// 	"s":     "",
+	// 	"sh":    "",
+	// 	"she":   "",
+	// 	"shy":   "shy",
+	// 	"ssshy": "ssshy",
+	// 	"hy":    "hy",
+	// },
+	// "s+hy": map[string]string{
+	// 	"s":     "",
+	// 	"sh":    "",
+	// 	"she":   "",
+	// 	"shy":   "shy",
+	// 	"ssshy": "ssshy",
+	// 	"hy":    "",
+	// },
+	// "sh[xyz]?": map[string]string{
+	// 	"s":     "",
+	// 	"sh":    "sh",
+	// 	"she":   "sh",
+	// 	"shy":   "shy",
+	// 	"shyyy": "shy",
+	// },
+	// "sh[xyz]*": map[string]string{
+	// 	"s":     "",
+	// 	"sh":    "sh",
+	// 	"she":   "sh",
+	// 	"shy":   "shy",
+	// 	"shyyy": "shyyy",
+	// 	"shyxz": "shyxz",
+	// },
+	// "sh[xyz]+": map[string]string{
+	// 	"s":      "",
+	// 	"sh":     "",
+	// 	"she":    "",
+	// 	"shy":    "shy",
+	// 	"shyyy":  "shyyy",
+	// 	"shyxzy": "shyxzy",
+	// },
+	// "[xyz]?sh": map[string]string{
+	// 	"s":      "",
+	// 	"sh":     "sh",
+	// 	"zsh":    "zsh",
+	// 	"zxyshy": "",
+	// },
+	// "[xyz]*sh": map[string]string{
+	// 	"s":      "",
+	// 	"sh":     "sh",
+	// 	"zsh":    "zsh",
+	// 	"zxyshy": "zxysh",
+	// },
+	// "[xyz]+sh": map[string]string{
+	// 	"s":      "",
+	// 	"sh":     "",
+	// 	"zsh":    "zsh",
+	// 	"zxyshy": "zxysh",
+	// },
+	// "[0-9]+": map[string]string{
+	// 	"hello": "",
+	// 	"hi123": "",
+	// 	"123":   "123",
+	// 	"123hi": "123",
+	// },
+	// "0x[0-9a-fA-F]+": map[string]string{
+	// 	"hello":     "",
+	// 	"0xhi123":   "",
+	// 	"0x123":     "0x123",
+	// 	"0xab123ab": "0xab123ab",
+	// 	"0x123ab":   "0x123ab",
+	// },
+	// "[a-zA-Z][a-zA-Z0-9]*": map[string]string{
+	// 	"hello": "hello",
+	// 	"hi123": "hi123",
+	// 	"123":   "",
+	// },
+	// "\"[^\"]*\"": map[string]string{
+	// 	"hello":      "",
+	// 	"0xhi123":    "",
+	// 	"\"hi\"":     "\"hi\"",
+	// 	"\"\\\"hi\"": "\"\\\"hi\"",
+	// },
+	}
+	for k, s := range seed {
+		Index.Start(m)
+		m.Cmd("train", k)
+		for i, v := range s {
+			if m.Cmd("parse", i) != v {
+				t.Error("train&parse error:", k, i, v)
+			}
+		}
+	}
+
+	Index.Start(m)
+	m.Cmd("train", "[ \n\t]+", "1")
+	m.Cmd("train", "[a-zA-Z][a-zA-Z0-9]*", "2", "2")
+	m.Cmd("train", "0x[0-9]+", "3", "2")
+	m.Cmd("train", "[0-9]+", "3", "2")
+	m.Cmd("train", "\"[^\"]*\"", "4", "2")
+	m.Cmd("train", "'[^']*'", "4", "2")
+
+	lex := Index.Server.(*LEX)
+	for _, v := range lex.seed {
+		t.Log(v.page, v.hash, v.word)
+	}
+
+	m.Cmd("split", "hello 0x2134 \"hi he\" meet\\ you")
+	// m.Cmd("parse", "0x54 nice to meet")
+	// m.Cmd("parse", "737 nice to meet")
+	// m.Cmd("parse", "\"73 u\" nice to meet")
+	// m.Cmd("parse", "'hh h' nice to meet")
+}