Added blog module as example, this is far from being a real blog module.

but this is an example about on to add a new content type, and support it.
Fixed new node form workflow.

The current state is not final, it requires many changes, but for now, it implements a node editing workflow.

examples/demo/modules/blog/cms_blog.e

@@ -0,0 +1,103 @@
+note
+	description: "Summary description for {CMS_BLOG}."
+	author: ""
+	date: "$Date$"
+	revision: "$Revision$"
+
+class
+	CMS_BLOG
+
+inherit
+	CMS_NODE
+		redefine
+			make_empty,
+			import_node
+		end
+
+create
+	make_empty,
+	make
+
+feature {NONE} -- Initialization
+
+	make_empty
+		do
+			Precursor
+		end
+
+feature {CMS_CONTENT_TYPE} -- Conversion
+
+	import_node (a_node: CMS_NODE)
+			-- <Precursor>
+		do
+			Precursor (a_node)
+			if attached {CMS_BLOG} a_node as l_blog then
+--				l_blog
+			end
+		end
+
+feature -- Access
+
+	content_type: READABLE_STRING_8
+		once
+			Result := {CMS_BLOG_CONTENT_TYPE}.name
+		end
+
+feature -- Access: content
+
+	summary: detachable READABLE_STRING_8
+			-- A short summary of the node.
+
+	content: detachable READABLE_STRING_8
+			-- Content of the node.
+
+	format: detachable READABLE_STRING_8
+			-- Format associated with `content' and `summary'.
+			-- For example: text, mediawiki, html, etc
+
+	tags: detachable ARRAYED_LIST [READABLE_STRING_32]
+			-- Optional tags
+
+feature -- Element change
+
+	set_content (a_content: like content; a_summary: like summary; a_format: like format)
+		do
+			content := a_content
+			summary := a_summary
+			format := a_format
+		end
+
+	add_tag (a_tag: READABLE_STRING_32)
+			-- Set `parent' to `a_page'
+		require
+			not a_tag.is_whitespace
+		local
+			l_tags: like tags
+		do
+			l_tags := tags
+			if l_tags = Void then
+				create l_tags.make (1)
+				tags := l_tags
+			end
+			l_tags.force (a_tag)
+		end
+
+	set_tags_from_string (a_tags: READABLE_STRING_32)
+		local
+			t: STRING_32
+		do
+			tags := Void
+			across
+				a_tags.split (',') as ic
+			loop
+				t := ic.item
+				t.left_adjust
+				t.right_adjust
+				if not t.is_whitespace then
+					add_tag (t)
+				end
+			end
+		end
+
+end
+