How do you make a field mandatory in XML schema?
The “use” property in the XSD definition is used to specify if the attribute is optional or mandatory. To specify that an attribute must be present, use=”required” (Note: use may also be set to “prohibited”, but we’ll come to that later).
What are the legal elements of XML?
XML Naming Rules
- Element names are case-sensitive.
- Element names must start with a letter or underscore.
- Element names cannot start with the letters xml (or XML, or Xml, etc)
- Element names can contain letters, digits, hyphens, underscores, and periods.
- Element names cannot contain spaces.
How do you write an element XML with no content?
“Empty XML Elements An element with no content is said to be empty. In XML, you can indicate an empty element like this: or you can use an empty tag, like this (this sort of element syntax is called self-closing): The two forms above produce identical results in an XML parser.”
Which attribute of schema is mandatory?
That is: the attribute “option” with some unknown value should be mandatory in any document using the complex type containing this element.
What is difference between CDATA and Pcdata?
CDATA means the element contains character data that is not supposed to be parsed by a parser. #PCDATA means that the element contains data that IS going to be parsed by a parser.
Can XML attributes be empty?
Attribute values can also be empty, but attributes must always be followed by an ‘=’ and a quoted string, even if the string contains no characters.
What is minOccurs and maxOccurs in XML?
The minOccurs attribute specifies the minimum number of times that the element can occur. It can have a value of 0 or any positive integer. The maxOccurs attribute specifies the maximum number of times that the element can occur.
What are the XML special characters?
Using Special Characters in XML
| Symbol (name) | Escape Sequence |
|---|---|
| < (less-than) | < or < |
| > (greater-than) | > or > |
| & (ampersand) | & |
| ‘ (apostrophe or single quote) | ‘ |
What is NCName in XML?
An xs:NCName is a noncolonized name as defined in “Namespaces in XML” 1.0. This is a legal XML name that does not contain a colon. The value must consist exclusively of letters, digits, ideographs, and the underscore, hyphen, and period.
Does it mean the XML element is mandatory?
Does it mean the XML element is mandatory? Or the XML element must have some non-null value? I am really confused by the javadoc explanation. Show activity on this post. which means the element and a value are mandatory. The default is false. which means the element is mandatory but you can pass in a nil value. Show activity on this post.
Does the XML element must have some non-null value?
Or the XML element must have some non-null value? I am really confused by the javadoc explanation. Show activity on this post. which means the element and a value are mandatory. The default is false. which means the element is mandatory but you can pass in a nil value.
What is an error in the task XML?
Error: The task XML is missing a required element or attribute. The /z switch is used to delete a task after it’s completed. For example, you can use the following command to start the Calc.exe process at a specified date and time: This issue affects only the Schtasks.exe tool.
How to check if an element is mandatory or not?
The default is false. which means the element is mandatory but you can pass in a nil value. Show activity on this post. The minOccurs indicator specifies the minimum number of times an element can occur. If element in the schema has minOccurs=”1″ attribute this means that the element is mandatory.