Lexical grammar The specification of a programming language often includes a set of rules, the lexical grammarwhich defines the lexical syntax. The lexical syntax is usually a regular languagewith the grammar rules consisting of regular expressions ; they define the set of possible character sequences lexemes of a token. A lexer recognizes strings, and for each kind of string found the lexical program takes an action, most simply producing a token.
SXML is more concise and expressive than a raw markup language. SXML as a data structure -- a list -- can likewise be composed as a literal or quasi-literal expression.
Furthermore, SXML can be produced by regular Scheme functions, which may make authoring more succinct, advanced, and less tedious, as the code below illustrates. The pretty-printing consists of two passes.
The first one traverses an s-expression tree in post-order, and converts it into a tree of HTML fragments. The tree of fragments, when flattened and concatenated, yields the resulting HTML document.
Of course there is no need to flatten the tree and concatenate strings explicitly. Rather, we traverse the tree of fragments depth-first and write out fragments.
In this approach, all character and other data, once created, stay where they were originally allocated.
No data are ever copied.
The second pass, a pre-order traversal of a tree of fragments, is performed by a function SRV: Besides writing out character data it encounters, the function executes thunks and ignores ' and f. This feature lets us, for example, embed conditional forms into an s-expression representing HTML: Here is a more meaningful example, which intelligently generates a "navigation bar", a pair of links to the preceding and the following slides.
Obviously the first and the last page must have only one navigation link. The SXML specification is an example of such an advanced composition. A better example of a logical markup is the following excerpt from SXML. It was also easier to type, especially given suitable Emacs key bindings, similar to those designed for LAML.
Using SXML to express its grammar has another important advantage: The expansion process of a tag can re-scan the SXML document, with a different stylesheet. That is how hierarchical tables of contents are generated. Unlike LaTeX, you do not need to write auxiliary files and do not need to re-run the document processor.
The function also handles "higher-level" HTML tags, for example, html: This page is authored in SXML. Local and site links are generated automatically. The advantage of the present approach compared to LAML is that we do not define any tag-related functions in the interaction-environment.
HTML tags appear to live in their own "namespace". Therefore, our approach is just as flexible and expressive as LAML.Apr 17, · With Microsoft XML Core Services (MSXML), formerly known as the Microsoft XML Parser, customers can build XML-based applications that follow the World Wide Web Consortium (W3C) XML standards.
MSXML is a Component Object Model (COM) implementation of the W3C DOM model. In computer science, lexical analysis, lexing or tokenization is the process of converting a sequence of characters (such as in a computer program or web page) into a sequence of tokens (strings with an assigned and thus identified meaning).
A program that performs lexical analysis may be termed a lexer, tokenizer, or scanner, though scanner is also a term for the first stage of a lexer. How to create XML file with specific structure in Java [duplicate] Ask Question. up vote 17 down vote favorite. 8. // Write the XML to file ashio-midori.comorm(source, result); } } Best XML parser for Java.
How do I comment out a block of tags in XML? Simple framework with powerful capabilities: The framework used to provide XML serialization is simple to use and revolves around several annotations an a single persister object used to read and write objects to and from XML.
Brian Randell DevelopMentor. October Summary: This article discusses how to access and manipulate XML documents via the XML DOM implementation, as exposed by the Microsoft® XML Parser. (10 printed pages) Contents. Introduction What Exactly is a DOM How Do I Use the XML DOM How Do I Load a Document.
Hi Mkyong, I have given the pathname which uses spaces in between, while reading the XML it is fine but when i am trying to write it (ashio-midori.comorm(source,result)) it is giving exception path not found.