A distinct, individual item that can be included in an XML document by referencing it. Such an entity reference can name an
entity as small as a character (for example, <, which references the less-than symbol or left angle bracket, <). An entity
reference can also reference an entire document, an external entity, or a collection of DTD definitions.
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entity is an idea..object is the instance of the idea..
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Tuesday, June 10, 2008
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A thread is a the entity within a process that Windows schedules for execution. A thread has. The contents of a set of CPU registers representing the state of the processor. 2 stacks, 1 for the thread to use in kernel mode, and 1 for user mode. Private storage called Thread Local Storage for use by subsystems, run-time libraries, and DLLs and;. A thread ID.
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Tuesday, May 13, 2008
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Uniform resource name. A unique identifier that identifies an entity but doesn't tell where it is located. A system can use a URN to look up an entity locally before trying to find it on the Web. It also allows the Web location to change, while still allowing the entity to be found.
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Tuesday, May 13, 2008
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A general entity that contains something other than XML. By its nature, an unparsed entity contains binary data.
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Tuesday, May 13, 2008
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There are two Integrity rules. Entity Integrity: States that "Primary key cannot have NULL value"
Referential Integrity: States that "Foreign Key can be either a NULL value or should be Primary Key value of other relation.
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Tuesday, May 13, 2008
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In XML documents, a piece of text that describes a unit of data or an element. The tag is distinguishable as markup, as opposed to data, because it is surrounded by angle brackets (<>). To treat such markup syntax as data, you use an entity reference or a CDATA section.
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