Punctuation string

In the assignment scheme herein formulated, the name associated with any molecule is a purely machine-readable number/letter/punctuation string. A summary of the morphemes used in assigning names to a compound is listed in Table 2. 

Linear Notation A SMILES notation is a string consisting of alphanumeric and certain punctuation characters. The notation terminates at the first space encountered while reading sequentially from left to right. 

By default, Entrez removes whitespace, some punctuation, and other special characters from the query string. To make sure Entrez treats the query as a single word or phrase, despite special characters, simply enclose the query in quotation marks. For example, to search the PubChem Compound database using the InChl string of aspirin, one would use ""InChI=l/C9H8O4/cl-6(10)13-8-5-3-2-4-7(8)9(ll)12/h2-5H,lH3,(H,ll,12)/f/hllH"[InChI]" as the query. 

The ASCII character set includes the letters a-z, A-Z, numbers 0-9, and most common punctuation marks. ASCII also includes a number of control characters, the most important of which is written as n, which is the code for a new line. Unlike many other languages, there is no fundamental string type however, one is included as part of the standard library. 

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