diff --git a/lexical.go b/lexical.go
new file mode 100644
index 0000000..3d61dfa
--- /dev/null
+++ b/lexical.go
@@ -0,0 +1,8 @@
+// Package filter ...
+//
+// Description : JSON 词法分析
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2022-07-04 17:52
+package filter
diff --git a/syntax.go b/syntax.go
new file mode 100644
index 0000000..c98c5bf
--- /dev/null
+++ b/syntax.go
@@ -0,0 +1,8 @@
+// Package filter ...
+//
+// Description : 语法分析
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2022-07-04 17:53
+package filter
diff --git a/token.go b/token.go
new file mode 100644
index 0000000..154b807
--- /dev/null
+++ b/token.go
@@ -0,0 +1,28 @@
+// Package filter ...
+//
+// Description : 关键词定义
+//
+// Author : go_developer@163.com<白茶清欢>
+//
+// Date : 2022-07-04 17:53
+package filter
+
+const (
+	// list 类型起始
+	listLeftToken = "["
+	// listRight list 类型结束
+	listRightToken = "]"
+	// 对象起始
+	objectLeftToken = "{"
+	// 对象结束
+	objectRightToken = "}"
+	// key 值的起始
+	keyLeftToken = "\""
+	// key 值的结束
+	keyRightToken = "\""
+	// kvPairSplit kv 的分隔符
+	kvPairSplitToken = ":"
+	// 转义符
+	escapeCharacterToken = "\\"
+)
+