I'm working with PubChem data and need to understand its programmatic access. First, what is the primary purpose of PUG-View, and how does its output differ from PUG-REST? Provide an example URL to retrieve a full report for 'Aspirin' using PUG-View. Second, what is the maximum number of requests per second allowed for PubChem web services, and what is the purpose of the 'Asynchronous Request' approach mentioned in the documentation? Third, if I want to access PubChem BioAssay data programmatically, what is the primary identifier used for BioAssays, and what specific types of data are Entrez Utilities (E-Utils) suited for?
Navigate to 'https://pubchem.ncbi.nlm.nih.gov/docs/programmatic-access'. Locate the 'PUG-View' section and identify its primary purpose and how its output differs from 'PUG-REST'. Scroll down the 'Programmatic Access' page to find the 'USAGE POLICY' section and identify the maximum number of requests per second. On the same 'Programmatic Access' page, locate and describe the purpose of the 'Asynchronous Request' approach. Click on the 'PUG View' link in the left-hand navigation menu (under 'Programmatic Access') to go to the dedicated PUG-View documentation page. On the 'PUG View' page, locate the 'Formats' section and formulate an example URL to retrieve a full report for 'Aspirin' in XML format using the provided URL structure. Navigate to the 'Data Organization' section of the documentation by clicking on the 'Data Organization' link in the left-hand navigation menu. Within the 'Data Organization' section, locate the 'BioAssays' subsection and identify the primary identifier used for BioAssays. Return to the 'Programmatic Access' page (if not already there) and locate the description for 'Entrez Utilities (E-Utils)' to identify the specific types of data they are suited for. Synthesize all gathered information to answer the task.
The primary purpose of PUG-View is stated as providing 'full reports, including third-party textual annotation, for individual PubChem records', and its output differs from PUG-REST by providing 'complex, structured data reports' compared to PUG-REST's 'simpler outputs'. An example URL to retrieve a full report for 'Aspirin' using PUG-View is provided (e.g., 'https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/name/Aspirin/XML'). The maximum number of requests per second allowed for PubChem web services is stated as '5 requests per second'. The purpose of the 'Asynchronous Request' approach is described as returning a 'key' as a response to an initial request, which is then used to 'check periodically whether the operation has finished, and, when complete, retrieve the results' for certain slower operations. The primary identifier used for PubChem BioAssays is stated as 'AID'. Entrez Utilities (E-Utils) are stated as being suited for accessing 'text or numeric-fielded data'.