# Core Concepts

Foundations of Arweave and the Permaweb.

• Posting Transactions
• Metadata (Tags)
• Querying
• Fetching Data
• Transaction Types
  • Bundles
  • Path Manifests
• Wallets and Keys
• Permaweb
  • Permaweb Applications
  • Gateway Services
  • Bundling Services
• Arweave File System (ArFS)
  • Data model
  • Entity Types
  • Content Types
  • Privacy
  • Schema Diagrams

Do you think a permaweb core concept is missing? Create a issue at Githubopen in new window or consider contributing