diff --git a/liteflow-core/src/main/java/com/yomahub/liteflow/util/ElRegexUtil.java b/liteflow-core/src/main/java/com/yomahub/liteflow/util/ElRegexUtil.java
index 25bfb884..eacbbd36 100644
--- a/liteflow-core/src/main/java/com/yomahub/liteflow/util/ElRegexUtil.java
+++ b/liteflow-core/src/main/java/com/yomahub/liteflow/util/ElRegexUtil.java
@@ -19,7 +19,7 @@ public class ElRegexUtil {
     private static final String REGEX_COMMENT = "(?<!(:|@))\\/\\/.*|\\/\\*(\\s|.)*?\\*\\/";
 
     // abstractChain 占位符正则表达式
-    private static final String REGEX_ABSTRACT_HOLDER = "\\{\\s*([a-zA-Z_][a-zA-Z_\\d]*|\\d+)\\s*\\}(?![\\s]*=)";
+    private static final String REGEX_ABSTRACT_HOLDER = "\\{\\{\\s*([a-zA-Z_][a-zA-Z_\\d]*|\\d+)\\s*\\}\\}(?![\\s]*=)";
 
     /**
      * 移除 el 表达式中的注释，支持 java 的注释，包括单行注释、多行注释， 会压缩字符串，移除空格和换行符
@@ -52,13 +52,13 @@ public class ElRegexUtil {
         while (placeHolderMatcher.find()) {
             //到implChain中找到对应的占位符实现
             String holder = placeHolderMatcher.group(1);
-            Pattern placeHolderImpl = Pattern.compile("\\s*\\{" + holder + "\\}\\s*=\\s*(.*?);");
+            Pattern placeHolderImpl = Pattern.compile("\\s*\\{\\{" + holder + "\\}\\}\\s*=\\s*(.*?);");
             Matcher implMatcher = placeHolderImpl.matcher(implChain);
             if (implMatcher.find()) {
                 String replacement = implMatcher.group(1).trim();
-                abstractChain = abstractChain.replace("{" + holder + "}", replacement);
+                abstractChain = abstractChain.replace("{{" + holder + "}}", replacement);
             } else {
-                throw new ParseException("missing implementation of {" + holder + "} in expression \r\n" + implChain);
+                throw new ParseException("missing implementation of {{" + holder + "}} in expression \r\n" + implChain);
             }
         }
         return abstractChain;
diff --git a/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.json b/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.json
index d6faf3c6..2d9e3767 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.json
+++ b/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.json
@@ -4,37 +4,35 @@
       {
         "id": "implB",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=j;"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=j;"
       },
       {
         "id": "implC",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
       },
       {
         "id": "base",
-        "abstract": true,
-        "value": "THEN(a, b, {0}, {1});"
+        "value": "THEN(a, b, {{0}}, {{1}});"
       },
       {
         "id": "implA",
         "extends": "base",
-        "value": "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+        "value": "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
       },
       {
         "id": "base2",
         "extends": "base",
-        "abstract": true,
-        "value": "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+        "value": "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
       },
       {
         "id": "base3",
-        "value": "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain});"
+        "value": "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}});"
       },
       {
         "id": "implD",
         "extends": "base3",
-        "value": "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+        "value": "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"
       }
     ]
   }
diff --git a/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.xml
index a5cfb055..d88f8fce 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.xml
+++ b/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.xml
@@ -1,38 +1,38 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <flow>
     <chain id="implB" extends="base2">
-        {3}=THEN(a,b);
-        {4}=j;
+        {{3}}=THEN(a,b);
+        {{4}}=j;
     </chain>
 
     <chain id="implC" extends="base2">
-        {3}=THEN(a,b);
-        {4}=THEN(a,b).id("j");
+        {{3}}=THEN(a,b);
+        {{4}}=THEN(a,b).id("j");
     </chain>
 
     <chain abstract="true" name="base">
-        THEN(a, b, {0}, {1})
+        THEN(a, b, {{0}}, {{1}})
     </chain>
 
     <chain id="implA" extends="base">
-        {0}=IF(c, d, e);
-        {1}=SWITCH(f).to(j,k);
+        {{0}}=IF(c, d, e);
+        {{1}}=SWITCH(f).to(j,k);
     </chain>
 
     <chain abstract="true" id="base2" extends="base">
-        {0}=THEN(a,b,{3});
-        {1}=SWITCH(f).to({4},k);
+        {{0}}=THEN(a,b,{{3}});
+        {{1}}=SWITCH(f).to({{4}},k);
     </chain>
     <chain name="base3">
-        THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})
+        THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})
     </chain>
 
     <chain extends="base3" id="implD">
-        {_pre} = THEN(a,b);
-        {mainChain}=THEN(a,b);
-        {subChain1}=THEN(j,k);
-        {subChain2}=IF(c, d, e);
-        {end_chain}=SWITCH(f).to(j,k);
+        {{_pre}} = THEN(a,b);
+        {{mainChain}}=THEN(a,b);
+        {{subChain1}}=THEN(j,k);
+        {{subChain2}}=IF(c, d, e);
+        {{end_chain}}=SWITCH(f).to(j,k);
     </chain>
 
 </flow>
\ No newline at end of file
diff --git a/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.yml b/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.yml
index e1ec5e50..10bea73e 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.yml
+++ b/liteflow-testcase-el/liteflow-testcase-el-declare-multi-springboot/src/test/resources/abstractChain/flow.el.yml
@@ -2,22 +2,22 @@ flow:
   chain:
     - id: implB
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=j;"
+      value: "{{3}}=THEN(a,b);\n {{4}}=j;"
     - id: implC
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+      value: "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
     - id: base
       abstract: true
-      value: "THEN(a, b, {0}, {1});"
+      value: "THEN(a, b, {{0}}, {{1}});"
     - id: implA
       extends: base
-      value: "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+      value: "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
     - id: base2
       extends: base
       abstract: true
-      value: "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+      value: "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
     - id: base3
-      value: "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})"
+      value: "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})"
     - id: implD
       extends: base3
-      value: "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+      value: "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"
diff --git a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.json b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.json
index d6faf3c6..2d9e3767 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.json
+++ b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.json
@@ -4,37 +4,35 @@
       {
         "id": "implB",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=j;"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=j;"
       },
       {
         "id": "implC",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
       },
       {
         "id": "base",
-        "abstract": true,
-        "value": "THEN(a, b, {0}, {1});"
+        "value": "THEN(a, b, {{0}}, {{1}});"
       },
       {
         "id": "implA",
         "extends": "base",
-        "value": "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+        "value": "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
       },
       {
         "id": "base2",
         "extends": "base",
-        "abstract": true,
-        "value": "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+        "value": "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
       },
       {
         "id": "base3",
-        "value": "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain});"
+        "value": "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}});"
       },
       {
         "id": "implD",
         "extends": "base3",
-        "value": "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+        "value": "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"
       }
     ]
   }
diff --git a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.xml
index a5cfb055..55d1a0ea 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.xml
+++ b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.xml
@@ -1,38 +1,38 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <flow>
     <chain id="implB" extends="base2">
-        {3}=THEN(a,b);
-        {4}=j;
+        {{3}}=THEN(a,b);
+        {{4}}=j;
     </chain>
 
     <chain id="implC" extends="base2">
-        {3}=THEN(a,b);
-        {4}=THEN(a,b).id("j");
+        {{3}} = THEN(a,b);
+        {{4}}=THEN(a,b).id("j");
     </chain>
 
-    <chain abstract="true" name="base">
-        THEN(a, b, {0}, {1})
+    <chain name="base">
+        THEN(a, b, {{0}}, {{1}})
     </chain>
 
     <chain id="implA" extends="base">
-        {0}=IF(c, d, e);
-        {1}=SWITCH(f).to(j,k);
+        {{0}}=IF(c, d, e);
+        {{1}}=SWITCH(f).to(j,k);
     </chain>
 
-    <chain abstract="true" id="base2" extends="base">
-        {0}=THEN(a,b,{3});
-        {1}=SWITCH(f).to({4},k);
+    <chain id="base2" extends="base">
+        {{0}}=THEN(a,b,{{3}});
+        {{1}}=SWITCH(f).to({{4}},k);
     </chain>
+
     <chain name="base3">
-        THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})
+        THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})
     </chain>
 
     <chain extends="base3" id="implD">
-        {_pre} = THEN(a,b);
-        {mainChain}=THEN(a,b);
-        {subChain1}=THEN(j,k);
-        {subChain2}=IF(c, d, e);
-        {end_chain}=SWITCH(f).to(j,k);
+        {{_pre}} = THEN(a,b);
+        {{mainChain}}=THEN(a,b);
+        {{subChain1}}=THEN(j,k);
+        {{subChain2}}=IF(c, d, e);
+        {{end_chain}}=SWITCH(f).to(j,k);
     </chain>
-
 </flow>
\ No newline at end of file
diff --git a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.yml b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.yml
index e1ec5e50..d2f80dce 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.yml
+++ b/liteflow-testcase-el/liteflow-testcase-el-declare-springboot/src/test/resources/abstractChain/flow.el.yml
@@ -2,22 +2,20 @@ flow:
   chain:
     - id: implB
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=j;"
+      value: "{{3}}=THEN(a,b);\n {{4}}=j;"
     - id: implC
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+      value: "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
     - id: base
-      abstract: true
-      value: "THEN(a, b, {0}, {1});"
+      value: "THEN(a, b, {{0}}, {{1}});"
     - id: implA
       extends: base
-      value: "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+      value: "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
     - id: base2
       extends: base
-      abstract: true
-      value: "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+      value: "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
     - id: base3
-      value: "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})"
+      value: "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})"
     - id: implD
       extends: base3
-      value: "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+      value: "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"
diff --git a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.json b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.json
index 8be75915..86c99f5a 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.json
+++ b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.json
@@ -40,37 +40,37 @@
       {
         "id": "implB",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=j;"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=j;"
       },
       {
         "id": "implC",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
       },
       {
         "id": "base",
         "abstract": true,
-        "value": "THEN(a, b, {0}, {1});"
+        "value": "THEN(a, b, {{0}}, {{1}});"
       },
       {
         "id": "implA",
         "extends": "base",
-        "value": "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+        "value": "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
       },
       {
         "id": "base2",
         "extends": "base",
         "abstract": true,
-        "value": "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+        "value": "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
       },
       {
         "id": "base3",
-        "value": "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain});"
+        "value": "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}});"
       },
       {
         "id": "implD",
         "extends": "base3",
-        "value": "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+        "value": "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"
       }
     ]
   }
diff --git a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.xml
index 7b11ef48..050266eb 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.xml
+++ b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.xml
@@ -12,38 +12,38 @@
     </nodes>
 
     <chain id="implB" extends="base2">
-        {3}=THEN(a,b);
-        {4}=j;
+        {{3}}=THEN(a,b);
+        {{4}}=j;
     </chain>
 
     <chain id="implC" extends="base2">
-        {3}=THEN(a,b);
-        {4}=THEN(a,b).id("j");
+        {{3}}=THEN(a,b);
+        {{4}}=THEN(a,b).id("j");
     </chain>
 
     <chain abstract="true" name="base">
-        THEN(a, b, {0}, {1})
+        THEN(a, b, {{0}}, {{1}})
     </chain>
 
     <chain id="implA" extends="base">
-        {0}=IF(c, d, e);
-        {1}=SWITCH(f).to(j,k);
+        {{0}}=IF(c, d, e);
+        {{1}}=SWITCH(f).to(j,k);
     </chain>
 
     <chain abstract="true" id="base2" extends="base">
-        {0}=THEN(a,b,{3});
-        {1}=SWITCH(f).to({4},k);
+        {{0}}=THEN(a,b,{{3}});
+        {{1}}=SWITCH(f).to({{4}},k);
     </chain>
     <chain name="base3">
-        THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})
+        THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})
     </chain>
 
     <chain extends="base3" id="implD">
-        {_pre} = THEN(a,b);
-        {mainChain}=THEN(a,b);
-        {subChain1}=THEN(j,k);
-        {subChain2}=IF(c, d, e);
-        {end_chain}=SWITCH(f).to(j,k);
+        {{_pre}} = THEN(a,b);
+        {{mainChain}}=THEN(a,b);
+        {{subChain1}}=THEN(j,k);
+        {{subChain2}}=IF(c, d, e);
+        {{end_chain}}=SWITCH(f).to(j,k);
     </chain>
 
 </flow>
\ No newline at end of file
diff --git a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.yml b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.yml
index 41c52e57..02485eb0 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.yml
+++ b/liteflow-testcase-el/liteflow-testcase-el-nospring/src/test/resources/abstractChain/flow.el.yml
@@ -20,23 +20,23 @@ flow:
   chain:
     - id: implB
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=j;"
+      value: "{{3}}=THEN(a,b);\n {{4}}=j;"
     - id: implC
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+      value: "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
     - id: base
       abstract: true
-      value: "THEN(a, b, {0}, {1});"
+      value: "THEN(a, b, {{0}}, {{1}});"
     - id: implA
       extends: base
-      value: "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+      value: "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
     - id: base2
       extends: base
       abstract: true
-      value: "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+      value: "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
     - id: base3
-      value: "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})"
+      value: "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})"
     - id: implD
       extends: base3
-      value: "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+      value: "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"
 
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.json b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.json
index 3dda6313..2d9e3767 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.json
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.json
@@ -4,35 +4,35 @@
       {
         "id": "implB",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=j;"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=j;"
       },
       {
         "id": "implC",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
       },
       {
         "id": "base",
-        "value": "THEN(a, b, {0}, {1});"
+        "value": "THEN(a, b, {{0}}, {{1}});"
       },
       {
         "id": "implA",
         "extends": "base",
-        "value": "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+        "value": "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
       },
       {
         "id": "base2",
         "extends": "base",
-        "value": "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+        "value": "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
       },
       {
         "id": "base3",
-        "value": "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain});"
+        "value": "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}});"
       },
       {
         "id": "implD",
         "extends": "base3",
-        "value": "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+        "value": "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"
       }
     ]
   }
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.xml
index d8dd470c..55d1a0ea 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.xml
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.xml
@@ -1,38 +1,38 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <flow>
     <chain id="implB" extends="base2">
-        {3}=THEN(a,b);
-        {4}=j;
+        {{3}}=THEN(a,b);
+        {{4}}=j;
     </chain>
 
     <chain id="implC" extends="base2">
-        {3} = THEN(a,b);
-        {4}=THEN(a,b).id("j");
+        {{3}} = THEN(a,b);
+        {{4}}=THEN(a,b).id("j");
     </chain>
 
     <chain name="base">
-        THEN(a, b, {0}, {1})
+        THEN(a, b, {{0}}, {{1}})
     </chain>
 
     <chain id="implA" extends="base">
-        {0}=IF(c, d, e);
-        {1}=SWITCH(f).to(j,k);
+        {{0}}=IF(c, d, e);
+        {{1}}=SWITCH(f).to(j,k);
     </chain>
 
     <chain id="base2" extends="base">
-        {0}=THEN(a,b,{3});
-        {1}=SWITCH(f).to({4},k);
+        {{0}}=THEN(a,b,{{3}});
+        {{1}}=SWITCH(f).to({{4}},k);
     </chain>
 
     <chain name="base3">
-        THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})
+        THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})
     </chain>
 
     <chain extends="base3" id="implD">
-        {_pre} = THEN(a,b);
-        {mainChain}=THEN(a,b);
-        {subChain1}=THEN(j,k);
-        {subChain2}=IF(c, d, e);
-        {end_chain}=SWITCH(f).to(j,k);
+        {{_pre}} = THEN(a,b);
+        {{mainChain}}=THEN(a,b);
+        {{subChain1}}=THEN(j,k);
+        {{subChain2}}=IF(c, d, e);
+        {{end_chain}}=SWITCH(f).to(j,k);
     </chain>
 </flow>
\ No newline at end of file
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.yml b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.yml
index 3a9fa147..d2f80dce 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.yml
+++ b/liteflow-testcase-el/liteflow-testcase-el-springboot/src/test/resources/abstractChain/flow.el.yml
@@ -2,20 +2,20 @@ flow:
   chain:
     - id: implB
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=j;"
+      value: "{{3}}=THEN(a,b);\n {{4}}=j;"
     - id: implC
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+      value: "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
     - id: base
-      value: "THEN(a, b, {0}, {1});"
+      value: "THEN(a, b, {{0}}, {{1}});"
     - id: implA
       extends: base
-      value: "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+      value: "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
     - id: base2
       extends: base
-      value: "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+      value: "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
     - id: base3
-      value: "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})"
+      value: "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})"
     - id: implD
       extends: base3
-      value: "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+      value: "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.json b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.json
index d6faf3c6..74d3a584 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.json
+++ b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.json
@@ -4,37 +4,37 @@
       {
         "id": "implB",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=j;"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=j;"
       },
       {
         "id": "implC",
         "extends": "base2",
-        "value": "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+        "value": "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
       },
       {
         "id": "base",
         "abstract": true,
-        "value": "THEN(a, b, {0}, {1});"
+        "value": "THEN(a, b, {{0}}, {{1}});"
       },
       {
         "id": "implA",
         "extends": "base",
-        "value": "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+        "value": "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
       },
       {
         "id": "base2",
         "extends": "base",
         "abstract": true,
-        "value": "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+        "value": "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
       },
       {
         "id": "base3",
-        "value": "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain});"
+        "value": "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}});"
       },
       {
         "id": "implD",
         "extends": "base3",
-        "value": "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+        "value": "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"
       }
     ]
   }
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.xml b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.xml
index e75c61b3..199a1286 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.xml
+++ b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.xml
@@ -1,39 +1,39 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <flow>
     <chain id="implB" extends="base2">
-        {3}=THEN(a,b);
-        {4}=j;
+        {{3}}=THEN(a,b);
+        {{4}}=j;
     </chain>
 
     <chain id="implC" extends="base2">
-        {3}=THEN(a,b);
-        {4}=THEN(a,b).id("j");
+        {{3}}=THEN(a,b);
+        {{4}}=THEN(a,b).id("j");
     </chain>
 
     <chain abstract="true" name="base">
-        THEN(a, b, {0}, {1})
+        THEN(a, b, {{0}}, {{1}})
     </chain>
 
     <chain id="implA" extends="base">
-        {0}=IF(c, d, e);
-        {1}=SWITCH(f).to(j,k);
+        {{0}}=IF(c, d, e);
+        {{1}}=SWITCH(f).to(j,k);
     </chain>
 
     <chain abstract="true" id="base2" extends="base">
-        {0}=THEN(a,b,{3});
-        {1}=SWITCH(f).to({4},k);
+        {{0}}=THEN(a,b,{{3}});
+        {{1}}=SWITCH(f).to({{4}},k);
     </chain>
 
     <chain name="base3">
-        THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})
+        THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})
     </chain>
 
     <chain extends="base3" id="implD">
-        {_pre} = THEN(a,b);
-        {mainChain}=THEN(a,b);
-        {subChain1}=THEN(j,k);
-        {subChain2}=IF(c, d, e);
-        {end_chain}=SWITCH(f).to(j,k);
+        {{_pre}} = THEN(a,b);
+        {{mainChain}}=THEN(a,b);
+        {{subChain1}}=THEN(j,k);
+        {{subChain2}}=IF(c, d, e);
+        {{end_chain}}=SWITCH(f).to(j,k);
     </chain>
 
 
diff --git a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.yml b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.yml
index e1ec5e50..10bea73e 100644
--- a/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.yml
+++ b/liteflow-testcase-el/liteflow-testcase-el-springnative/src/test/resources/abstractChain/flow.el.yml
@@ -2,22 +2,22 @@ flow:
   chain:
     - id: implB
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=j;"
+      value: "{{3}}=THEN(a,b);\n {{4}}=j;"
     - id: implC
       extends: base2
-      value: "{3}=THEN(a,b);\n {4}=THEN(a,b).id(\"j\");"
+      value: "{{3}}=THEN(a,b);\n {{4}}=THEN(a,b).id(\"j\");"
     - id: base
       abstract: true
-      value: "THEN(a, b, {0}, {1});"
+      value: "THEN(a, b, {{0}}, {{1}});"
     - id: implA
       extends: base
-      value: "{0}=IF(c, d, e);\n  {1}=SWITCH(f).to(j,k);"
+      value: "{{0}}=IF(c, d, e);\n  {{1}}=SWITCH(f).to(j,k);"
     - id: base2
       extends: base
       abstract: true
-      value: "{0}=THEN(a,b,{3});\n {1}=SWITCH(f).to({4},k);"
+      value: "{{0}}=THEN(a,b,{{3}});\n {{1}}=SWITCH(f).to({{4}},k);"
     - id: base3
-      value: "THEN({_pre},{mainChain}, {subChain1},{subChain2},{end_chain})"
+      value: "THEN({{_pre}},{{mainChain}}, {{subChain1}},{{subChain2}},{{end_chain}})"
     - id: implD
       extends: base3
-      value: "{_pre} = THEN(a,b);\n {mainChain}=THEN(a,b);\n{subChain1}=THEN(j,k);\n{subChain2}=IF(c, d, e);\n{end_chain}=SWITCH(f).to(j,k);"
+      value: "{{_pre}} = THEN(a,b);\n {{mainChain}}=THEN(a,b);\n{{subChain1}}=THEN(j,k);\n{{subChain2}}=IF(c, d, e);\n{{end_chain}}=SWITCH(f).to(j,k);"