Domtree Definition

In RAG (Retrieval-Augmented Generation) systems, high-quality document parsing is a key foundation for ensuring accuracy and efficiency of downstream tasks. As a core component of the document parsing module, the DomTree protocol transforms complex heterogeneous raw documents into programmable and reasoning-capable tree-structured logical structures by structurally representing the hierarchical and semantic relationships of documents.

Structure Definition

Field Name	Field Description	Data Type
root	Root node	Node
source_file	Document source	object
id	File ID	string
name	File name	string
type	e.g.: pdf	string
mime_type	e.g.: application/pdf	string
version	File version number	number
summary	Summary	string
tokens	Estimated token count	number
path	Hierarchical information with numbering, e.g.: [1,2,1]	array[number]
element	Element information	Element
type	One of the following: ["Text","Title","List","Catalog","Table","Figure","Formula","Code","ListItem"]	string
positions	Position information, may span pages so it's an array	array[Position]
bbox	Rectangle coordinate information in document, e.g.: [90.1,263.8,101.8,274.3]	array[double]
page	Page number	integer
name	Name if type is Table or Figure	string
description	Description if type is Table or Figure	string
text	Text information, OCR text from images	string
image	Image information	image
type	Can be image_url, image_base64, image_file	string
url	Link address	string
base64	Base64 encoded image	string
file_id	File ID uploaded to file-api	String
rows	Table-specific attribute, table rows	array[Cell]
cells	Cell attributes	Cell
path	Cell position in table: start row, end row, start column, end column	array[number]
text	Text	string
nodes	Used for complex cell elements, path numbering starts from beginning within node	array[Node]
children	Child node information	array[Node]