Week 10

The first article:

https://burks.bton.ac.uk/burks/internet/web/xmlintro.htm 

gave me the message: This webpage is not available

The webpage at https://burks.bton.ac.uk/burks/internet/web/xmlintro.htm might be temporarily down or it may have moved permanently to a new web address.

Error 501 (net::ERR_INSECURE_RESPONSE): Unknown error.

I was not able to access it to write notes.

Uche Ogbuji. A survey of XML standards: Part 1. January 2004

XML

XML (which uses Unicode) is the base of the expanding XML technology. 

XML has strict rules for text formats and document type definition

The main change of XML is that it adjust the treatment of characters in XML so that it adapts better to the changes in Unicode

Standard Generalized Markup Language (SGML) is used by XML.  It is simplified and has adjustments that make it better suited to the web

XML catalogs gives a format as to how XML defines processor resolves XML entity identifiers into documents. 

Uniform Resource Identifiers = URIs

URI’s are an extension of URLS.  URLS add URNS.  These allow web resources to be referred to by name instead of location.

Public identifiers are usually specified as Formal Public Identifiers (FPIs), defined in SGML

XML is catalog is an XML doc, an XML defines a catalog format in a simpler text called OASIS Open Catalog

XML Namespaces enables universal naming of elements.

Namespace allows for the same words to be used multiple times by creating a vocabulary markers and a special syntax for displaying them.

There are mixed opinions on namespace because some people believe the gain is not worth the pain.

Jonathan Borden and Tim Bray (and the rest of the XHTML) community created the Resource Directory Description Language (RDDL), this offers prose descriptions of the vocabulary with embedded XLink to help navigate to key resources to help understand namespace.

Xinclude was still in development at the time of the article.  It is used to separate XML documents into “manageable” chunks.  With xinclude documents can be separated and pieced back together.

XML Infoset = XML Information Set. 

Describes an XML document as a series of objects, called information items, with specialized properties.

Canonical XML Version 1.0 is a standard method for generating a physical representation of an XML document, called the canonical form, that accounts for the variations allowed in XML syntax without changing meaning.

XML Path Language (XPath) 1.0 is a syntax and a data model for addressing parts of an XML document.

XML Schema Part 1: Structures and XML Schema Part 2: Datatypes; the first part allows one to constrain the structure of the document, and the second part allows one to constrain the contents of simple elements and attributes.

This week I did not have a specific muddiest point. CSS seemed very interested, just an overload of information!