Lesson 1: Working with XML Structures in .NET

Make PDF 417 in .NET Lesson 1: Working with XML Structures

Lesson 1: Working with XML Structures
PDF 417 Generation In VS .NET
Using Barcode printer for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in Visual Studio .NET applications.
www.OnBarcode.com
Decoding PDF 417 In .NET Framework
Using Barcode recognizer for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Lesson 1: Working with XML Structures
Barcode Creation In VS .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create barcode image in .NET applications.
www.OnBarcode.com
Read Bar Code In .NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in .NET framework applications.
www.OnBarcode.com
XML is a platform-independent, data-representation format that offers certain benefits over a relational format for specific data-representation requirements. XML has been widely used in user-interface rendering and data-transformation scenarios but has not been used much as a data-storage format. Until recently, relational databases didn t support XML data manipulation (other than composing XML documents from a relational representation). In 2003, the International Organization for Standardization (ISO) and the American National Standards Institute (ANSI) released Part 14 of the SQL Standard XML-Related Specifications (SQLXML), which specifies how a relational database can natively manage XML data. And SQL Server 2005 embraces this specification to give database administrators (DBAs) and developers more flexibility in working with different types of data. This lesson focuses on the strategies you can use to store XML data in a SQL Server 2005 relational database and the structures required to efficiently support this storage.
Creating PDF-417 2d Barcode In Visual C#
Using Barcode encoder for VS .NET Control to generate, create PDF 417 image in VS .NET applications.
www.OnBarcode.com
Painting PDF 417 In VS .NET
Using Barcode creation for ASP.NET Control to generate, create PDF417 image in ASP.NET applications.
www.OnBarcode.com
After this lesson, you will be able to:
Printing PDF417 In VB.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in .NET framework applications.
www.OnBarcode.com
PDF417 Encoder In .NET Framework
Using Barcode drawer for VS .NET Control to generate, create PDF 417 image in Visual Studio .NET applications.
www.OnBarcode.com
Choose the proper XML storage option. Define table columns, parameters, and Transact-SQL variables by using the XML data type. Add type information to an XML data type column, parameter, or variable by using an XML schema.
Code 39 Maker In .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create Code-39 image in VS .NET applications.
www.OnBarcode.com
USS Code 128 Printer In Visual Studio .NET
Using Barcode creator for .NET Control to generate, create Code 128C image in VS .NET applications.
www.OnBarcode.com
Estimated lesson time: 30 minutes
GS1 DataBar Expanded Encoder In Visual Studio .NET
Using Barcode generator for Visual Studio .NET Control to generate, create GS1 DataBar image in .NET framework applications.
www.OnBarcode.com
Leitcode Generator In .NET Framework
Using Barcode maker for Visual Studio .NET Control to generate, create Leitcode image in VS .NET applications.
www.OnBarcode.com
Storage Options for XML data
Barcode Reader In Visual C#
Using Barcode Control SDK for .NET Control to generate, create, read, scan barcode image in .NET framework applications.
www.OnBarcode.com
Paint 1D Barcode In Java
Using Barcode encoder for Java Control to generate, create 1D Barcode image in Java applications.
www.OnBarcode.com
Storing data as XML offers several benefits. First, XML is self-describing, so applications can consume XML data without knowing its schema or structure. XML data is always arranged hierarchically as a tree structure. XML tree structures must always have a root, or parent, node that is known as an XML document. If a set of XML nodes doesn t have a root node, it is said to be an XML fragment. Second, XML maintains document ordering. Because XML structure is hierarchical, maintaining node order is important because it dictates the distance between nodes inside the tree structure. Third, schema declaration provides type information and structure validation. XML Schema language is a standard language that you use to define a valid structure for a specific XML document or fragment. XML schemas also provide type information to
Bar Code Generator In Visual Studio .NET
Using Barcode encoder for Reporting Service Control to generate, create barcode image in Reporting Service applications.
www.OnBarcode.com
Draw Code-128 In Java
Using Barcode encoder for Java Control to generate, create USS Code 128 image in Java applications.
www.OnBarcode.com
8
Quick Response Code Encoder In Java
Using Barcode maker for Java Control to generate, create Quick Response Code image in Java applications.
www.OnBarcode.com
QR-Code Drawer In None
Using Barcode creation for Online Control to generate, create Denso QR Bar Code image in Online applications.
www.OnBarcode.com
Managing XML Data
UPC Symbol Scanner In C#
Using Barcode recognizer for VS .NET Control to read, scan read, scan image in VS .NET applications.
www.OnBarcode.com
Print PDF417 In Visual Basic .NET
Using Barcode creation for .NET framework Control to generate, create PDF-417 2d barcode image in .NET applications.
www.OnBarcode.com
the data in the XML structure. XML Schema enables you to declare optional sections inside the schema or generic types that accept any XML fragment. This capability means you can represent not only structured data but also semistructured and unstructured data. Fourth, XML data is searchable. Because of XML s hierarchical structure, you can apply multiple algorithms to search inside tree structures. XQUERY and XPATH are query languages designed to search XML data. And fifth, XML data is extensible. You can manipulate XML data by inserting, modifying, or deleting nodes. This capability means that you can create new XML instances out of existing XML structures.
NOTE
Data representation types
Here are definitions of the three data representation types:
Homogeneous static data structure in which all instances of the data follow the same structure.
Structured data
Heterogeneous data structure that can contain dynamic or optional structures. Instances can look completely different from each other but still conform to the same schema.
Semistructured data Unstructured data
Heterogeneous data that does not conform to a schema. In XML, data can exist without having a schema to define its structure.
Applications that manipulate XML execute a variety of actions on data, such as creating new XML documents, filtering an XML document and extracting relevant nodes based on a filter expression, transforming an XML fragment into another XML structure, and updating or modifying the current data inside the XML structure. The way applications store XML data affects which of these possible actions are at your disposal. SQL Server 2005 enables you to store XML data in two ways:
As XML in the database in a text column As XML in the database in an XML data type column
Storing XML data as relational data
MORE INFO
Lesson 5 in this chapter covers storing data as a relational representation and applying composition and shredding techniques to transform relational data into XML and back.
Lesson 1: Working with XML Structures
Storing XML in Text Columns
You can store XML data in a text column by using the (n)char, (n)varchar, or varbinary data types. For these data types, SQL Server 2005 introduces the MAX argument, which allocates a maximum storage size of 2 GB. The following code example stores XML data in the nvarchar data type:
DECLARE @myXML AS nvarchar(max) SET @myXML = '<log><application>Sales</application><description>The connection timed out</description></log>'
Copyright © OnBarcode.com . All rights reserved.