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--- notes:xml_schema_cheat_sheet [2026/09/13 11:18]
42.108.141.116 old revision restored (2026/08/03 08:06)
+++ notes:xml_schema_cheat_sheet [2026/09/14 03:21] (current)
216.73.217.14 old revision restored (2026/09/11 12:03)
@@ Line 1: / Line 1: @@
 ===== XML Schema =====
+This is a cheat sheet for the XML Schema language. It is a follow up to the [[XML Cheat Sheet]] and summarizes [[http://www.w3schools.com/schema/default.asp | this XML Schema Tutorial]].
   * XML Schema is an XML-based alternative to DTDs. It is the successor to DTDs because it is richer and more extensible. It describes the structure of an XML document.
@@ Line 41: / Line 43: @@
   * By default an attribute is optional, to make it required add  use="required" .
-==== XML Facets / Restrictions ====
+==== Facets / Restrictions ====
   * XML Facets are restrictions on the acceptable values for elements or attributes.
@@ Line 150: / Line 152: @@
 </xs:complexType></code>
-==== XSD Element Indicators ====
+==== Element Indicators ====
   * Indicators control how elements are to be used within a complex element. There are three types of indicators: order indicators, occurrence indicators and group indicators
@@ Line 174: / Line 177: @@
 <xs:group ref="persongroup"/></code>
-* An Attribute group is similar e.g. <code>
+ * An Attribute group is similar for example. <code>
 <xs:attributeGroup name="personattrgroup">
   <xs:attribute name="firstname" type="xs:string"/>
   <xs:attribute name="lastname" type="xs:string"/>
-</xs:attributeGroup></code> A reference to the attribute group in a complex type would look like :<code> <xs:attributeGroup ref="personattrgroup"/> </code>
+</xs:attributeGroup></code> A reference to the attribute group in a complex type would look like : <code>
+ <xs:attributeGroup ref="personattrgroup"/> </code>
+  * Using <xs:any /> as an element allows elements not specified in the schema to occur.
+  * Using <xs:anyAttribute/> in a complex type allows use of attributes not specified by the schema.
+  * A substitution group allows other elements to substitute for the first. The head elemenet must be a global element (a direct child of the schema element) e.g. <code>
+<xs:element name="name" type="xs:string"/>
+<xs:element name="navn" substitutionGroup="name"/>
+</code> Substitution can be blocked with <code><xs:element name="name" type="xs:string" block="substitution"/></code>
+==== Data Types ====
+=== String Data Types ===
+  * Apart from xs:string there are two other string stypes :
+    * xs:normalizedString - No CR, LF or TAB characters are allowed
+    * xs:token - No CR, LF or TAB characters are allowed, no leading or trailing spaces are allowed, no sequences of more than one space is allowed
+  * There are many other types derived from string e.g. NMTOKEN, QName, ID, IDREF.
+=== Date Data Types ===
+  * date data type is used to specify a date in the format "YYYY-MM-DD" where all components are required.
+  * A time data type must be specified in the following format "hh:mm:ss" where all components are required.
+  * A dateTime datatype must be specified in the following format "YYYY-MM-DDThh:mm:ss" e.g. 2002-05-30T09:00:00
+  * A timezone can be added to a date/time/dateTime by adding a Z (for UTC) or a signed offset at the end e.g. 2002-09-24Z , 2002-09-24+06:00
+  * A duration data type must be specified in the following format "[-]PnYnMnDTnHnMnS" P is required, T is required if any time component is used and the other parts are optional e.g. P5Y, P5Y2M10DT15H, -P1Y
+  * This is a list of all date types.
+^ Type ^     Description                    ^
+| date | Defines a date value ("YYYY-MM-DD")|
+|dateTime 	|Defines a date and time value ("YYYY-MM-DDThh:mm:ss")|
+|duration 	|Defines a time interval ([-]PnYnMnDTnHnMnS)|
+|gDay 	|Defines a part of a date - the day (DD)|
+|gMonth 	|Defines a part of a date - the month (MM)|
+|gMonthDay 	|Defines a part of a date - the month and day (MM-DD)|
+|gYear 	|Defines a part of a date - the year (YYYY)|
+|gYearMonth 	|Defines a part of a date - the year and month (YYYY-MM)|
+|time 	|Defines a time value ("hh:mm:ss") |
+=== Numeric Data types ===
+  * The xs:decimal data type specifies a positive or negative numeric value (with fractional part).
+  * The xs:integer data type specifies a positive or negative integer.
+  * These are all the numeric types, which all derive from the decimal type.
+^Name  	^Description^
+|byte 	|A signed 8-bit integer|
+|decimal 	|A decimal value|
+|int 	|A signed 32-bit integer|
+|integer 	|An integer value|
+|long 	|A signed 64-bit integer|
+|negativeInteger 	|An integer containing only negative values ( .., -2, -1.)|
+|nonNegativeInteger 	|An integer containing only non-negative values (0, 1, 2, ..)|
+|nonPositiveInteger 	|An integer containing only non-positive values (.., -2, -1, 0)|
+|positiveInteger 	|An integer containing only positive values (1, 2, ..)|
+|short 	|A signed 16-bit integer|
+|unsignedLong 	|An unsigned 64-bit integer|
+|unsignedInt 	|An unsigned 32-bit integer|
+|unsignedShort 	|An unsigned 16-bit integer|
+|unsignedByte 	|An unsigned 8-bit integer|
+=== Other Data Types ===
+  * xs:boolean is a booleantype which must be true or false
+  * xs:base64Binary and xs:hexBinary specify base-46 and hexadecimal encoded binary data respectively
+  * xs:anyURI can be used for any URL or URN.
+  * There are also xs:double and xs:float data types.

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