Group items tagged

Technical Architect The technical architect is usually a technology specialist in a particular technology.

the technology architect is expected to know the various vendor tools in the technology area, the latest trends in the market, and various architectural alternatives for implementing the solution

"Chief Architect."

The senior position has the title "Lead Architect."

<xs:complexType name="fullpersoninfo"> <xs:complexContent> <xs:extension base="personinfo">

Restrictions on a Set of Values To limit the content of an XML element to a set of acceptable values, we would use the enumeration constraint.

<xs:restriction base="xs:string"> <xs:enumeration value="Audi"/> <xs:enumeration value="Golf"/> <xs:enumeration value="BMW"/> </xs:restriction>

type="carType"/>

<xs:simpleType name="carType">

the type "carType" can be used by other elements

series of numbers or letters that can be used, we would use the pattern constraint.

<xs:restriction base="xs:string"> <xs:pattern value="[a-z]"/>

<xs:pattern value="male|female"/>

The whiteSpace constraint is set to "preserve", which means that the XML processor WILL NOT remove any white space characters:

<xs:whiteSpace value="preserve"/>

The whiteSpace constraint is set to "replace", which means that the XML processor WILL REPLACE all white space characters (line feeds, tabs, spaces, and carriage returns) with spaces:

<xs:whiteSpace value="replace"/>

<xs:length value="8"/>

<xs:minLength value="5"/> <xs:maxLength value="8"/>

Constraint Description enumeration Defines a list of acceptable values fractionDigits Specifies the maximum number of decimal places allowed. Must be equal to or greater than zero length Specifies the exact number of characters or list items allowed. Must be equal to or greater than zero maxExclusive Specifies the upper bounds for numeric values (the value must be less than this value) maxInclusive Specifies the upper bounds for numeric values (the value must be less than or equal to this value) maxLength Specifies the maximum number of characters or list items allowed. Must be equal to or greater than zero minExclusive Specifies the lower bounds for numeric values (the value must be greater than this value) minInclusive Specifies the lower bounds for numeric values (the value must be greater than or equal to this value) minLength Specifies the minimum number of characters or list items allowed. Must be equal to or greater than zero pattern Defines the exact sequence of characters that are acceptable totalDigits Specifies the exact number of digits allowed. Must be greater than zero whiteSpace Specifies how white space (line feeds, tabs, spaces, and carriage returns) is handled

Attributes are optional by default. To specify that the attribute is required, use the "use" attribute: <xs:attribute name="lang" type="xs:string" use="required"/>

The syntax for defining a simple element is: <xs:element name="xxx" type="yyy"/>

built-in data types

xs:string xs:decimal xs:integer xs:boolean xs:date xs:time

A default value is automatically assigned to the element when no other value is specified.

default="red"/

A fixed value is also automatically assigned to the element, and you cannot specify another value.

fixed="red"/

attribute

child

descendant

descendant-or-self

following

parent

An absolute location path: /step/step/... A relative location path: step/step/...

axisname::nodetest[predicate]

<note date="12/11/2007">

Entity References

XML Documents Must Have a Root Element

If you place a character like "<" inside an XML element, it will generate an error because the parser interprets it as the start of a new element.

(child elements

< < less than > > greater than & & ampersand  ' ' apostrophe " " quotation mark

XML Attribute Values Must be Quoted

With XML, White Space is Preserved

Comments in XML

<!-- This is a comment -->

<choice> indicator specifies that either one child element or another can occur

The <sequence> indicator specifies that the child elements must appear in a specific order:

Occurrence indicators are used to define how often an element can occur.

For all "Order" and "Group" indicators (any, all, choice, sequence, group name, and group reference) the default value for maxOccurs and minOccurs is 1.

The <maxOccurs> indicator specifies the maximum number of times an element can occur:

The <minOccurs> indicator specifies the minimum number of times an element can occur:

To allow an element to appear an unlimited number of times, use the maxOccurs="unbounded" statement:

Group indicators are used to define related sets of elements.

<xs:group name="groupname">

After you have defined a group, you can reference it in another definition

<xs:group name="persongroup">

<xs:group ref="persongroup"/>

<xs:attributeGroup name="groupname">

<xs:attributeGroup ref="personattrgroup"/>

no words are reserved.

Best Naming Practices

Make names descriptive

Names should be short and simple

Avoid "-"

Avoid "."

Avoid ":"

use the naming rules of your database for the elements in the XML documents.

Non-English letters

XML elements must follow these naming rules: Names can contain letters, numbers, and other characters Names must not start with a number or punctuation character Names must not start with the letters xml (or XML, or Xml, etc) Names cannot contain spaces

make names descriptive.

XML Schema became a W3C Recommendation 02. May 2001.

<f:table>

XML Namespaces - The xmlns Attribute When using prefixes in XML, a so-called namespace for the prefix must be defined. The namespace is defined by the xmlns attribute in the start tag of an element.

<h:table xmlns:h="http://www.w3.org/TR/html4/">

xmlns:prefix="URI".

<f:table xmlns:f="http://www.w3schools.com/furniture">

xmlns:namespace-prefix="namespaceURI"

Namespaces can be declared in the elements where they are used or in the XML root element:

Note that the address used to identify the namespace is not used by the parser to look up information. The only purpose is to give the namespace a unique name.

The namespace URI is not used by the parser to look up information. The purpose is to give the namespace a unique name

Uniform Resource Identifier (URI) A Uniform Resource Identifier (URI) is a string of characters which identifies an Internet Resource. The most common URI is the Uniform Resource Locator (URL) which identifies an Internet domain address.

not so common type of URI is the Universal Resource Name (URN)

Default Namespaces Defining a default namespace for an element saves us from using prefixes in all the child elements.

<table xmlns="http://www.w3.org/TR/html4/">

quickly a large number of software vendors have adopted the standard.

quickly a large number of software vendors have adopted the standard.