Package: rentrez 1.2.4

Introduction: The NCBI, entrez and rentrez. | Getting started with the rentrez | Searching databases: entrez_search() | Building search terms | Using the Filter field | Advanced counting | Finding cross-references : entrez_link(): | My god, it's full of links | Narrowing our focus | External links | Using more than one ID | Getting summary data: entrez_summary() | The summary record | Dealing with many records | Fetching full records: entrez_fetch() | Fetch DNA sequences in fasta format | Fetch a parsed XML document | Using NCBI's Web History features | Get a web_history object from entrez_search or entrez_link() | Use a web_history object | Rate-limiting and API Keys | Slowing rentrez down when you hit the rate-limit | What next ?