XML,DTD,Schemas Interview Questions

1. XLink Markup Design
Link markup needs to be recognized reliably by XLink applications in order to be traversed and handled properly. XLink uses the mechanism described in the Namespaces in XML Recommendation [XML Names] to accomplish recognition of the constructs in the XLink vocabulary.

2. XLink Processing and Conformance
Processing Dependencies: XLink processing depends on [XML], [XML Names], [XML Base], and [IETF RFC 2396]
Markup Conformance:
An XML element conforms to XLink if:
it has a type attribute from the XLink namespace whose value is one of "simple", "extended", "locator", "arc", "resource", "title", or "none", and it adheres to the conformance constraints imposed by the chosen XLink element type, as prescribed in this specification.

This specification imposes no particular constraints on DTDs; conformance applies only to elements and attributes.

Application Conformance:
An XLink application is any software module that interprets well-formed XML documents containing XLink elements and attributes, or XML information sets [XIS] containing information items and properties corresponding to XLink elements and attributes. (This document refers to elements and attributes, but all specifications herein apply to their information set equivalents as well.) Such an application is conforming if:

it observes the mandatory conditions for applications ("must") set forth in this specification, and for any optional conditions ("should" and "may") it chooses to observe, it observes them in the way prescribed, and it performs markup conformance testing according to all the conformance constraints appearing in this specification.

3. What three essential components of security does the XML Signatures provide?
authentication, message integrity, and non-repudiation. In addition to signature information, an XML Signature can also contain information describing the key used to sign the content.

4. What are the valid values for xlink:actuate and xlink:show?
Don't blame me to put such a simple question here. I saw a famous exam simulator gave wrong answer on this one. Typing them out also help me to remember them. xlink:actuate onRequest, onLoad, other, none xlink:show replace new embed other none

5. What's XLink?
This specification defines the XML Linking Language (XLink), which allows elements to be inserted into XML documents in order to create and describe links between resources. It uses XML syntax to create structures that can describe links similar to the simple unidirectional hyperlinks of today's HTML, as well as more sophisticated links.
Definition: An XLink link is an explicit relationship between resources or portions of resources.] [Definition: It is made explicit by an XLink linking element, which is an XLink-conforming XML element that asserts the existence of a link.] There are six XLink elements; only two of them are considered linking elements. The others provide various pieces of information that describe the characteristics of a link. (The term "link" as used in this specification refers only to an XLink link, though nothing prevents non-XLink constructs from serving as links.)