Contents
Do XML attributes have to have a value?
XML Attributes Must be Quoted Attribute values must always be quoted. Either single or double quotes can be used.
What is the rule for writing XML attribute values?
Attribute values must always be quoted It is illegal to omit quotation marks around attribute values. XML elements can have attributes in name/value pairs; however, the attribute value must always be quoted. In the incorrect document, the date attribute in the note element is not quoted.
Can XML elements have multiple attributes?
Attributes are part of XML elements. An element can have multiple unique attributes. Attribute gives more information about XML elements. An XML attribute is always a name-value pair.
How do we specify attributes in XML document?
An attribute should be declared using the attribute-list declaration in the DTD (Document Type Definition). An attribute element is used without any quotation and the attribute value is used in a single (‘ ‘) or double quotation (” “). An attribute name and its value should always appear in pair.
Can XML attributes be empty?
Empty XML Elements An element with no content is said to be empty. The two forms produce identical results in XML software (Readers, Parsers, Browsers). Empty elements can have attributes.
What are the elements and attributes in XML?
XML – Elements
- element-name is the name of the element. The name its case in the start and end tags must match.
- attribute1, attribute2 are attributes of the element separated by white spaces. An attribute defines a property of the element. It associates a name with a value, which is a string of characters.
What are the rules for XML?
There are nine basic rules for building good XML:
- All XML must have a root element.
- All tags must be closed.
- All tags must be properly nested.
- Tag names have strict limits.
- Tag names are case sensitive.
- Tag names cannot contain spaces.
- Attribute values must appear within quotes (“”).
- White space is preserved.
What are the key components of XML?
The most basic components of an XML document are elements, attributes, and comments. To make it easier to understand how these components work in an XML document, we will look at them using Microsoft XML Notepad.