By William Allan Wulf

A vintage within the box of compilers. This booklet describes the layout of a compiler for the BLISS language for the PDP-11, considered as one of many first compilers to supply good optimized laptop code. as a result transparent layout of the compiler it continues to be a staple in compiler learn to at the present time.

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On the other hand, extra space is allowed before the >. For example, < foo> is not allowed, but is. Similarly, the closing tag is allowed, but not or < /foo>. , <> is not allowed. Tag names must begin with an alpha character or an underscore’_’, and subsequent characters may also include digits, hyphens, and periods. Alphabetic characters can be upper or lowercase. 28 2 An Introduction to XML No space, colon, or the triple "xml" may appear in a tag name. The "xml" may be accepted by many XML parsers, but officially, it is reserved for future use.

This is type = "list" within the node. In this case, the attribute conveys metadata about the content of the node. In other XML documents, the attributes often contain data. us/developers): ENACTED:SIGNED ... ....

In general, the start tag has the format and the matching end-tag is identical except for the addition of the forward slash between the < and the tag name. In many respects, pairs of opening and ending tags are like parentheses, but with names that make it easier to identify the pairs when the elements are nested hierarchically. Child Elements and Recursive Structure XML elements can have content made up of other XML elements that are treated as child elements. It is this nested/recursive structure that allows us to represent different, complex data structures using XML.

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