| title | Data Accessor Functions | Microsoft Docs | |
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| ms.custom | ||
| ms.date | 03/14/2017 | |
| ms.prod | sql-non-specified | |
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| ms.tgt_pltfrm | ||
| ms.topic | language-reference | |
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| ms.assetid | 31bad04f-7c74-4773-9f83-612704fdd21c | |
| caps.latest.revision | 30 | |
| author | JennieHubbard | |
| ms.author | jhubbard | |
| manager | jhubbard |
[!INCLUDEtsql-appliesto-ss2012-xxxx-xxxx-xxx_md]
The topics in this section discuss and provide sample code for the data-accessor functions.
XQuery has a function fn:data() to extract scalar, typed values from nodes, a node test text() to return text nodes, and the function fn:string() that returns the string value of a node. Their use can be confusing. The following are guidelines for using them correctly in [!INCLUDEssNoVersion]. The XML instance <age>12</age> is used for the purpose of illustration.
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Untyped XML: The path expression /age/text() returns the text node "12". The function fn:data(/age) returns the string value "12" and so does fn:string(/age).
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Typed XML: The expression /age/text() returns a static error for any simple typed <age> element. On the other hand, fn:data(/age) returns integer 12. The fn:string(/age) yields the string "12".