Sources of extraction
Data can be extracted from websites, PDFs, APIs, emails, or scanned documents. In the context of web data, extraction usually means isolating specific fields — a price, a product title, a phone number — out of a full HTML page.
Extraction methods
Common techniques include CSS selectors, XPath queries, regular expressions, and increasingly, AI-based extraction that can identify fields even when a page’s layout changes. Managed extraction services combine several of these methods so the output stays reliable as source sites update their design.
