diff --git a/.gitignore b/.gitignore
index ba5cd9de2ba7960418a26dc6f3266cfc6c0ed2e9..adb6cd182845f85554c9492b141ba7793334c44b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -30,3 +30,4 @@
 /runtime/protobuf/out/
 /users/common/
 *.exe
+/tmp/cache/.data.db
diff --git a/.zd.conf b/.zd.conf
index 4a97cdbe90a54bc5acf2d40b62717eb01897b4be..9c2d7d57f9edeb5621d3745cdc482d38bfc43f5b 100644
--- a/.zd.conf
+++ b/.zd.conf
@@ -1,3 +1,3 @@
-Version  = 2.2
+Version = 2.2
 Language = zh
 
diff --git a/cmd/command/main.go b/cmd/command/main.go
index 041cc7ce3b1be4b2d3cf41d66af5fee2b9578753..929ce9c75081f7f9224ea37aa7af4eacd30188bb 100644
--- a/cmd/command/main.go
+++ b/cmd/command/main.go
@@ -114,9 +114,6 @@ func main() {
 	flagSet.BoolVar(&example, "e", false, "")
 	flagSet.BoolVar(&example, "example", false, "")
 
-	flagSet.BoolVar(&help, "h", false, "")
-	flagSet.BoolVar(&help, "help", false, "")
-
 	flagSet.BoolVar(&set, "S", false, "")
 	flagSet.BoolVar(&set, "set", false, "")
 
@@ -131,6 +128,9 @@ func main() {
 
 	flagSet.BoolVar(&vari.Verbose, "verbose", false, "")
 
+	flagSet.BoolVar(&help, "h", false, "")
+	flagSet.BoolVar(&help, "help", false, "")
+
 	if len(os.Args) == 1 {
 		os.Args = append(os.Args, "-help")
 	}
diff --git a/demo/default.yaml b/demo/default.yaml
index aecc65840c725ab3a13f1c98a06b6b621bb73ed1..68c0c7486354daf665e6bc497056035b0d4a7886 100644
--- a/demo/default.yaml
+++ b/demo/default.yaml
@@ -104,9 +104,9 @@ fields:
     range: user.txt:R                   # 相对当前文件路径。
     postfix: "\t"
 
-#  - field: field_yaml                   # 引用其他的定义文件整体内容。
-#    range: 01_range.yaml{3}             # 相对当前文件路径。
-#    postfix: "\t"
+  - field: field_yaml                   # 引用其他的定义文件整体内容。
+    range: 01_range.yaml{3}             # 相对当前文件路径。
+    postfix: "\t"
 
   - field: field_use_config             # 引用其他的config定义文件。
     config: number.yaml                 # 相对当前文件路径，config内包含单个字段。
diff --git a/demo/t.yaml b/demo/t.yaml
index a64bf8982b73b5d44712cdb22a9a5c0af22877a3..d38073e0b138b991c74c6056c64664895d76b450 100644
--- a/demo/t.yaml
+++ b/demo/t.yaml
@@ -1,15 +1,32 @@
-title: zendata数据配置语法说明
-desc:
-
-author: zentao
+title: range
+desc: 描述
 version: 1.0
 
 fields:
   - field: f1
-    from: uuid.v1.yaml
-    use: by_format
+    range: 1-6
+    postfix: "\t"
+
+  - field: nesting1
     postfix: "\t"
+    union: true
+    fields:
+      - field: child1
+        range: A-C
+        prefix: part1_
+        postfix: ' | '
+
+      - field:  child2
+        range: 1-9
+        prefix: part2_
+
+  - field: nesting2
+    fields:
+      - field: child1
+        range: A-C
+        prefix: part1_
+        postfix: ' | '
 
-  - field: f2
-    from: ulid.v1.yaml
-    use: ulid{3}
\ No newline at end of file
+      - field:  child2
+        range: 1-9
+        prefix: part2_
\ No newline at end of file
diff --git a/internal/agent/agent.go b/internal/agent/agent.go
index 00552f79aab0b0240e83f538206e312af58671cd..c2dac77f27e36514bed6c2e4c303ec021cafa581 100644
--- a/internal/agent/agent.go
+++ b/internal/agent/agent.go
@@ -14,9 +14,9 @@ import (
 )
 
 var (
-	configs     []string
-	defaultFile string
-	configFile  string
+	configs           []string
+	defaultFile       string
+	configFile        string
 	defaultDefContent []byte
 	configDefContent  []byte
 
@@ -61,6 +61,8 @@ func DataHandler(writer http.ResponseWriter, req *http.Request) {
 		defaultFile = ""
 		configFile = ""
 	}
+
+	//writer.WriteHeader(http.StatusAccepted)
 }
 
 func genData() {
@@ -85,4 +87,4 @@ func genData() {
 		dur := tmEnd.Unix() - tmStart.Unix()
 		logUtils.PrintTo(fmt.Sprintf("Duriation %d sec.", dur))
 	}
-}
\ No newline at end of file
+}
diff --git a/internal/pkg/action/generator.go b/internal/pkg/action/generator.go
index 9ad7c618beef65372d1b14f96a92c50ec8eea868..c09b7f18a531200f2d21bf1cdfc57da787da896a 100644
--- a/internal/pkg/action/generator.go
+++ b/internal/pkg/action/generator.go
@@ -13,7 +13,7 @@ import (
 	"time"
 )
 
-func Generate(files []string, fieldsToExportStr, format, table string) {
+func Generate(files []string, fieldsToExportStr, format, table string) (lines []interface{}) {
 	startTime := time.Now().Unix()
 	if len(files) == 0 {
 		return
@@ -28,7 +28,7 @@ func Generate(files []string, fieldsToExportStr, format, table string) {
 			vari.ConfigFileDir = fileUtils.GetAbsDir(files[1])
 		}
 		contents := gen.LoadFilesContents(files)
-		GenerateByContent(contents, fieldsToExportStr, format, table)
+		lines = GenerateByContent(contents, fieldsToExportStr, format, table)
 
 	} else { // gen from protobuf
 		buf, pth := gen.GenerateFromProtobuf(files[0])
@@ -94,7 +94,7 @@ func GenerateByContent(contents [][]byte, fieldsToExportStr, format, table strin
 	}
 
 	if !isFromExcel(format) { // returned is for preview, sql exec and article writing
-		lines = gen.Print(rows, format, table, colIsNumArr, fieldsToExport)
+		lines = gen.PrintLines(rows, format, table, colIsNumArr, fieldsToExport)
 	} else { // for Excel and cvs
 		gen.Write(rows, table, colIsNumArr, fieldsToExport)
 	}
diff --git a/internal/pkg/gen/list.go b/internal/pkg/gen/list.go
index 6da41d50e5d77ba6259f4d6ddf82816bc8431657..a544935a88b439ddc16c5156642226afbadf1096 100644
--- a/internal/pkg/gen/list.go
+++ b/internal/pkg/gen/list.go
@@ -349,7 +349,7 @@ func CreateValuesFromYaml(field *model.DefField, yamlFile, stepStr string, repea
 		rows = randomValuesArr(rows)
 	}
 
-	items = Print(rows, constant.FormatData, "", colIsNumArr, fieldsToExport)
+	items = PrintLines(rows, constant.FormatData, "", colIsNumArr, fieldsToExport)
 
 	if repeat > 0 {
 		if repeat > len(items) {
diff --git a/internal/pkg/gen/printer.go b/internal/pkg/gen/printer.go
index eb66177fc83c37d42868a641acc3ca3156e8d99c..2ed4b7dbf9ef0c3656326a2519030543c5e60fe9 100644
--- a/internal/pkg/gen/printer.go
+++ b/internal/pkg/gen/printer.go
@@ -14,7 +14,7 @@ import (
 	"github.com/easysoft/zendata/pkg/utils/vari"
 )
 
-func Print(rows [][]string, format string, table string, colIsNumArr []bool,
+func PrintLines(rows [][]string, format string, table string, colIsNumArr []bool,
 	fields []string) (lines []interface{}) {
 
 	var sqlHeader string
diff --git a/internal/pkg/model/domain.go b/internal/pkg/model/domain.go
index ad1afc37f9dd2e935fe5114ae48a48ff83941da2..222887a287dca9d32cef55b5da8641a7ab86653f 100644
--- a/internal/pkg/model/domain.go
+++ b/internal/pkg/model/domain.go
@@ -55,6 +55,7 @@ type DefField struct {
 	RightPad  string     `yaml:"rightpad,omitempty"`
 	Path      string     `yaml:"path,omitempty"`
 	FileDir   string     `yaml:"fileDir,omitempty"`
+	Union     bool       `yaml:"union,omitempty"`
 
 	Froms []DefField `yaml:"froms,flow,omitempty"`
 }
diff --git a/pkg/utils/log/print.go b/pkg/utils/log/print.go
index 205eb073b5a05b7b55c3305d14b634731c4f1c84..3bc33c3a29e73508cea0babd45c9ae46a8664b6d 100644
--- a/pkg/utils/log/print.go
+++ b/pkg/utils/log/print.go
@@ -51,7 +51,7 @@ func PrintUsage() {
 		regx, _ = regexp.Compile(`zd.exe`)
 		usage = regx.ReplaceAllString(usage, "zd")
 
-		regx, _ = regexp.Compile(`d:/zd/config        `)
+		regx, _ = regexp.Compile(`d:\zd\config        `)
 		usage = regx.ReplaceAllString(usage, "/home/user/zd/config")
 	}
 	fmt.Printf("%s\n", usage)
diff --git a/res/en/usage.txt b/res/en/usage.txt
index 35065276825eb17096e1bb2b673a9ab5e31a15d5..6eb3d3f2b5e8c6e8cb4df22d9b32bb35c5d5d4c2 100644
--- a/res/en/usage.txt
+++ b/res/en/usage.txt
@@ -67,6 +67,6 @@ $zd.exe -p 80 -R d:\zd\config           # Listen port 80. Use d:\zd\config as th
 
 Client Call:
 
-$curl http:\\localhost:8848\?d=demo\default.yaml&c=demo\config.yaml&n=100&T=true   # Specify the server config file via GET.
-$curl http:\\localhost:8848\?default=demo\default.yaml&output=test.sql&table=user  # Parameter names can be full.
-$curl -i -X POST http:\\localhost:8848?lines=3 -F default=@demo\default.yaml       # The config can be uploaded via POST.
+$curl http://localhost:8848/data?d=demo/default.yaml&c=demo/config.yaml&n=100&T=true   # Specify the server config file via GET.
+$curl http://localhost:8848/data?default=demo/default.yaml&output=test.sql&table=user  # Parameter names can be full.
+$curl -i -X POST http://localhost:8848/data?lines=3 -F default=@demo/default.yaml      # The config can be uploaded via POST.
diff --git a/res/zh/usage.txt b/res/zh/usage.txt
index 295b145a77d242793147c9558bbd6d69c580f1ad..638e4561023508e23cc2d97f797bd8a5f899cb15 100644
--- a/res/zh/usage.txt
+++ b/res/zh/usage.txt
@@ -62,6 +62,6 @@ $zd.exe -p 80 -R d:\zd\config                                        # 监听80
 
 客户端调用：
 
-$curl http://localhost:8848/?d=demo/default.yaml&c=demo/config.yaml&n=100&T=true    # 通过GET方式指定服务器端配置文件。
-$curl http://localhost:8848/?default=demo/default.yaml&output=test.sql&table=user   # 参数名可以用全拼。
-$curl -i -X POST http://localhost:8848?lines=3 -F default=@demo/default.yaml        # 可以通过POST方式上传配置文件。
+$curl http://localhost:8848/data?d=demo/default.yaml&c=demo/config.yaml&n=100&T=true    # 通过GET方式指定服务器端配置文件。
+$curl http://localhost:8848/data?default=demo/default.yaml&output=test.sql&table=user   # 参数名可以用全拼。
+$curl -i -X POST http://localhost:8848/data?lines=3 -F default=@demo/default.yaml       # 可以通过POST方式上传配置文件。