Principle:PrefectHQ Prefect HTML Parsing
| Metadata | |
|---|---|
| Sources | BeautifulSoup |
| Domains | Web_Scraping, Data_Engineering |
| Last Updated | 2026-02-09 00:00 GMT |
Overview
A pattern for extracting structured text content from raw HTML using DOM traversal and element filtering.
Description
HTML Parsing transforms raw HTML into structured, clean text by traversing the DOM tree and extracting relevant elements. It involves: finding the main content container (article or main tag), removing unwanted elements (code blocks, scripts), and formatting the remaining text with headings and paragraphs. When wrapped as a Prefect task, parsing operations gain observability and can be tracked independently of the fetch step.
Usage
Use this pattern as the second step in a web scraping pipeline, after HTML has been fetched, to extract clean text content from pages.
Theoretical Basis
DOM traversal with element filtering. The algorithm:
- Parse HTML into DOM tree
- Locate content container (article/main)
- Remove noise elements (pre, code)
- Extract text from content elements (h1-h3, p, ul, ol, li)
- Format output with structure
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