# sim-codec-doc
In one line: It turns document text, plain or Markdown, into structured pieces you can work with, and writes it back out.
## What it gives you
This treats a document as more than a flat wall of text. It reads plain writing or Markdown and turns it into an organized value with real parts -- blocks, sections, and chunks -- that the runtime can hold and hand around. It can write that structure back out as a document again. Along the way it can split a document into chunks while keeping track of where each piece came from, so a passage always remembers its place in the whole. That makes it easy to pull a document apart for review, search, or processing and still trust the origin of every fragment. It sticks to documents and their chunks, and steps aside cleanly for anything outside that job.
## Why you will be glad
- Plain text and Markdown become organized, workable structure.
- Documents split into chunks that remember exactly where they came from.
- The written form comes back out as a readable document again.
## Where it fits
This is a focused, domain member of the SIM codec family. Rather than handling every kind of value, it specializes in documents, giving the runtime a dependable way to read, divide, and rewrite written material.