doc: update daleth concept

README.md

@@ -19,24 +19,39 @@ Markup language ecosystem сombining small file size, big number of possibilitie
 This is Daleth (high level language that compiles to Daletl).
 
 ```yaml
-# tag: body
-# each line is a new tag (if not {}, () is used)
+# tag syntax
+#
+# tag: text body
+# tag (multiline text body)
 # body text always trimmed
+#
+# tag { multiple tags body }
+#
+# Arguments
+# tag[argument]
+#
+# Tags without body and argument also supported
+
+meta[title]: Daleth syntax concept
+meta[description]: This document describes Daleth syntax and some tags
+
 h[1]: TxtDot revolution
 p: TxtDot is a cool project
 
-# If no tag is specified, then the 'element' tag, the most primitive tag, is placed
+# If no tag is specified, then the 'paragraph' tag is placed
+# () for block of text
 (
 Check Dalet too
 This is one paragraph
 )
 
 This is another paragraph
+br
 
 # [ ] for argument
-row[center]: {
+row[center] {
   link[https://github.com/txtdot/txtdot]: Homepage
-  btn[https://example.com/donate]: {
+  btn[https://example.com/donate] {
     # tag without body
     img[https://example.com/donate.png]
     Donate
@@ -44,11 +59,11 @@ row[center]: {
 }
 
 # {} for multiple objects
-row: {
+row {
   {
     h[2]: Features
 
-    ul: {
+    ul {
       Server-side page simplification
       Media proxy
       Image compression with Sharp
@@ -69,24 +84,24 @@ row: {
       h[3]: Dev
 
       # () for multiline strings, indent is automatically trimmed
-      code: (
+      code (
         npm install
         npm run dev
       )
 
       # (~n Text) n is number of minimum spaces
-      code[markdown]: (~4
+      code[markdown] (~4
         this is codeblock
       )
 
       # (# Text) Text after "(# " not modified
-      code[markdown]: (#     this is codeblock)
+      code[markdown] (#     this is codeblock)
     }
 
     {
       h[3]: Production
 
-      code: (
+      code (
         npm install
         npm run build
         npm run start
@@ -103,22 +118,22 @@ row: {
 }
 
 # Table has custom format if text used
-# +< cells > - primary column
-#  < cells > - secondary column
-#  < Element | Description > - converts to
-#  tcol: {
+# +| cells | - primary column
+#  | cells | - secondary column
+#  | Element | Description | - converts to
+#  tcol {
 #    Element
 #    Description
 #  }
-table: (
-  +< Element  | Description     >
-   < h        | Heading         >
-   < p        | Paragraph       >
-   < img      | Image           >
-   < link     | Link            >
-   < btn      | Button          >
-   < ul       | Unordered list  >
-   < br       | Line break      >
-  +< quantity | 7               >
+table (
+  +| Element  | Description     |
+   | h        | Heading         |
+   | p        | Paragraph       |
+   | img      | Image           |
+   | link     | Link            |
+   | btn      | Button          |
+   | ul       | Unordered list  |
+   | br       | Line break      |
+  +| quantity | 7               |
 )
 ```

specification/daletl.md

@@ -2,7 +2,7 @@
 
 ## Daletl
 
-Daletl is data representation of serialized/deserialized [DaletPack](./daletpack.md).
+Daletl is data representation of deserialized [DaletPack](./daletpack.md).
 
 ### Page
 

specification/tags.md

@@ -481,7 +481,7 @@ disc[Click to expand]: I am Disclosure
 
 | Property | Description                   |
 | -------- | ----------------------------- |
-| name     | bl                            |
+| name     | block                         |
 | id       | 26                            |
 | body     | text, tags                    |
 | argument | optional; start, center, end  |
@@ -491,7 +491,7 @@ Creates block element. Can be used for aligning. By default aligned to center.
 **Daleth example**:
 
 ```yaml
-bl: I am Block
+block: I am Block
 ```
 
 Argument converts to numbers in daletl.
@@ -549,6 +549,23 @@ Creates pre formatted text block. Like code but without style and highlight.
 
 **Daleth example**:
 
-```txt
+```yaml
 pre: I am pre
 ```
+
+## 30. Metadata
+
+| Property | Description    |
+| -------- | -------------- |
+| name     | meta           |
+| id       | 30             |
+| body     | text           |
+| argument | text           |
+
+Not displayed. Specifies metadata such as title, description. Must be before all tags if specified.
+
+**Daleth example**:
+
+```yaml
+meta[description]: I am description
+```