diff --git a/src/shared-configs/BlockRules.ts b/src/shared-configs/BlockRules.ts
new file mode 100644
index 0000000..f934095
--- /dev/null
+++ b/src/shared-configs/BlockRules.ts
@@ -0,0 +1,11 @@
+import { Format } from "src/enums";
+import { BlockFormat, BlockFormatRule } from "src/types";
+
+export const BlockRules: Record<BlockFormat, BlockFormatRule> = {
+    [Format.FENCED_DIV]: {
+        char: ":",
+        length: 3,
+        exactLen: false,
+        class: "fenced-div"
+    }
+}
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diff --git a/src/shared-configs/FormatRules.ts b/src/shared-configs/FormatRules.ts
deleted file mode 100644
index 4de2b50..0000000
--- a/src/shared-configs/FormatRules.ts
+++ /dev/null
@@ -1,50 +0,0 @@
-import { Format } from "src/enums";
-import { MainFormat } from "src/types";
-
-export const FormatRules: Record<MainFormat, { char: string, length: number, exactLen: boolean, allowSpace: boolean, getEl: () => Element }> = {
-    [Format.INSERTION]: {
-        char: "+",
-        length: 2,
-        exactLen: true,
-        allowSpace: true,
-        getEl: () => document.createElement("ins")
-    },
-    [Format.SPOILER]: {
-        char: "|",
-        length: 2,
-        exactLen: true,
-        allowSpace: true,
-        getEl: () => {
-            let spoilerEl = document.createElement("span");
-            spoilerEl.addClass("spoiler");
-            spoilerEl.addEventListener("click", (evt) => {
-                let spoilerEl = evt.currentTarget as Element,
-                    isHidden = !spoilerEl.hasClass("spoiler-revealed");
-                spoilerEl.toggleClass("spoiler-revealed", isHidden);
-            });
-            return spoilerEl;
-        }
-    },
-    [Format.SUPERSCRIPT]: {
-        char: "^",
-        length: 1,
-        exactLen: true,
-        allowSpace: false,
-        getEl: () => document.createElement("sup")
-    },
-    [Format.SUBSCRIPT]: {
-        char: "~",
-        length: 1,
-        exactLen: true,
-        allowSpace: false,
-        getEl: () => document.createElement("sub")
-    },
-    // unused
-    [Format.HIGHLIGHT]: {
-        char: "=",
-        length: 2,
-        exactLen: false,
-        allowSpace: true,
-        getEl: () => document.createElement("mark")
-    }
-}
\ No newline at end of file
diff --git a/src/shared-configs/InlineRules.ts b/src/shared-configs/InlineRules.ts
new file mode 100644
index 0000000..bdc97d1
--- /dev/null
+++ b/src/shared-configs/InlineRules.ts
@@ -0,0 +1,78 @@
+import { Format } from "src/enums";
+import { InlineFormatRule, InlineFormat } from "src/types";
+
+export const InlineRules: Record<InlineFormat, InlineFormatRule> = {
+    [Format.INSERTION]: {
+        char: "+",
+        length: 2,
+        exactLen: true,
+        allowSpace: true,
+        mustBeClosed: true,
+        class: "ins",
+        getEl: () => document.createElement("ins"),
+        builtin: false
+    },
+    [Format.SPOILER]: {
+        char: "|",
+        length: 2,
+        exactLen: true,
+        allowSpace: true,
+        mustBeClosed: true,
+        class: "spoiler",
+        getEl: () => {
+            let spoilerEl = document.createElement("span");
+            spoilerEl.addClass("spoiler");
+            spoilerEl.addEventListener("click", (evt) => {
+                let spoilerEl = evt.currentTarget as Element,
+                    isHidden = !spoilerEl.hasClass("spoiler-revealed");
+                spoilerEl.toggleClass("spoiler-revealed", isHidden);
+            });
+            return spoilerEl;
+        },
+        builtin: false
+    },
+    [Format.SUPERSCRIPT]: {
+        char: "^",
+        length: 1,
+        exactLen: true,
+        allowSpace: false,
+        mustBeClosed: true,
+        class: "sup",
+        getEl: () => document.createElement("sup"),
+        builtin: false
+    },
+    [Format.SUBSCRIPT]: {
+        char: "~",
+        length: 1,
+        exactLen: true,
+        allowSpace: false,
+        mustBeClosed: true,
+        class: "sub",
+        getEl: () => document.createElement("sub"),
+        builtin: false
+    },
+    [Format.HIGHLIGHT]: {
+        char: "=",
+        length: 2,
+        exactLen: false,
+        allowSpace: true,
+        mustBeClosed: false,
+        class: "custom-highlight",
+        getEl: () => document.createElement("mark"),
+        builtin: true
+    },
+    [Format.CUSTOM_SPAN]: {
+        char: "!",
+        length: 2,
+        exactLen: true,
+        allowSpace: true,
+        mustBeClosed: true,
+        class: "custom-span",
+        getEl() {
+            let el = document.createElement("span");
+            el.classList.add(InlineRules[Format.CUSTOM_SPAN].class);
+            return el;
+        },
+        builtin: false
+    }
+}
\ No newline at end of file