XML Schema内置数据类型

Schema的内置类型继承关系

 

 

 

Schema内置类型说明

 

Table 2. Simple Types Built In to XML SchemaSimple TypeExamples (delimited by commas)NotesstringConfirm this is electric normalizedStringConfirm this is electricsee (3)tokenConfirm this is electricsee (4)base64BinaryGpM7 hexBinary0FB7 integer...-1, 0, 1, ...see (2)positiveInteger1, 2, ...see (2)negativeInteger... -2, -1see (2)nonNegativeInteger0, 1, 2, ...see (2)nonPositiveInteger... -2, -1, 0see (2)long-9223372036854775808, ... -1, 0, 1, ... 9223372036854775807see (2)unsignedLong0, 1, ... 18446744073709551615see (2)int-2147483648, ... -1, 0, 1, ... 2147483647see (2)unsignedInt0, 1, ...4294967295see (2)short-32768, ... -1, 0, 1, ... 32767see (2)unsignedShort0, 1, ... 65535see (2)byte-128, ...-1, 0, 1, ... 127see (2)unsignedByte0, 1, ... 255see (2)decimal-1.23, 0, 123.4, 1000.00see (2)float-INF, -1E4, -0, 0, 12.78E-2, 12, INF, NaNequivalent to single-precision 32-bit floating point, NaN is "not a number", see (2)double-INF, -1E4, -0, 0, 12.78E-2, 12, INF, NaNequivalent to double-precision 64-bit floating point, see (2)booleantrue, false, 1, 0 durationP1Y2M3DT10H30M12.3S1 year, 2 months, 3 days, 10 hours, 30 minutes, and 12.3 secondsdateTime1999-05-31T13:20:00.000-05:00May 31st 1999 at 1.20pm Eastern Standard Time which is 5 hours behind Co-Ordinated Universal Time, see (2)date1999-05-31see (2)time13:20:00.000, 13:20:00.000-05:00see (2)gYear19991999, see (2) (5)gYearMonth1999-02the month of February 1999, regardless of the number of days, see (2) (5)gMonth--05May, see (2) (5)gMonthDay--05-31every May 31st, see (2) (5)gDay---31the 31st day, see (2) (5)NameshipToXML 1.0 Name typeQNamepo:USAddressXML Namespace QNameNCNameUSAddressXML Namespace NCName, i.e. a QName without the prefix and colonanyURIhttp://www.example.com/,http://www.example.com/doc.html#ID5 languageen-GB, en-US, frvalid values for xml:lang as defined in XML 1.0ID XML 1.0 ID attribute type, see (1)IDREF XML 1.0 IDREF attribute type, see (1)IDREFS XML 1.0 IDREFS attribute type, see (1)ENTITY XML 1.0 ENTITY attribute type, see (1)ENTITIES XML 1.0 ENTITIES attribute type, see (1)NOTATION XML 1.0 NOTATION attribute type, see (1)NMTOKENUS,BrésilXML 1.0 NMTOKEN attribute type, see (1)NMTOKENSUS UK,Brésil Canada MexiqueXML 1.0 NMTOKENS attribute type, i.e. a whitespace separated list of NMTOKEN's, see (1)

Notes:

(1) To retain compatibility between XML Schema and XML 1.0 DTDs, the simple types ID, IDREF, IDREFS, ENTITY, ENTITIES, NOTATION, NMTOKEN, NMTOKENS should only be used in attributes.

(2) A value of this type can be represented by more than one lexical format, e.g. 100 and 1.0E2 are both valid float formats representing "one hundred". However, rules have been established for this type that define a canonical lexical format, seeXML Schema Part 2.

(3) Newline, tab and carriage-return characters in a normalizedString type are converted to space characters before schema processing.

 (4) As normalizedString, and adjacent space characters are collapsed to a single space character, and leading and trailing spaces are removed.

(5) The "g" prefix signals time periods in the Gregorian calendar.

 

 

各种内置类型详解

 

1：string及其相关类型

 

string：保留原始字符串。

normalizedString：字符串中Newline、tab和carriage-return都会被替换成空白。

token：字符串中Newline、tab和carriage-return都会被替换成空白，并且字符串中间连续的空白会被压缩成一个，字符串前后的空白会被自动删除。

 

Name：要求是合法的XML签名。

NCName：不带命名空间的XML签名。

QName：带命名空间的XML签名。

 

由string派生出来的ID、IDREF、ENTITY、ENTITIES、NMTOKEN、NMTOKENS类型只能用来约束属性。

ID：标识符。

IDREF：引用另一个ID。

IDREFS：引用多个已有的ID，空格为分隔符。

NMTOKEN：必须是合法的XML名称，只能由字母、数字、_、-、.、:组成。

NMTOKENS：多个NMTOKEN，空格为分隔符。

ENTITY：外部实体。

ENTITIES：多个外部实体，空格为分隔符。