Qualquer um que tenha um XSD parcial que descreve a seção de metadados de arquivos XML Delphi TClientDataset?
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20-08-2019 - |
Pergunta
Eu sei que você não pode descrever completamente o XML que o TClientDataSet com um esquema XSD, como os elementos de linha têm atributos que têm nomes que variam de acordo com o conteúdo.
No entanto, a seção de metadados de tal XML deve ser.
Assim: há alguém ter um XSD (parcial) que descreve a parte de metadados XML que podem ser salvas com Delphi TClientDataSets
?Cumprimentos.
PS:
Obrigado por os ponteiros para em XML> ferramentas de conversão XSD / sites; Eu deveria ter escrito que eu fiz que eu mesmo também, mas que a geração que XSD em um bom caminho (ou seja, aquele que cobre todas as possibilidades) terá XML de entrada que cobrir todas as possibilidades (como ida e volta, RowState, etc). Vou tentar chegar a um XSD decente que maneira e postá-lo aqui.
Solução 2
Editar:
Dividir o XSD em duas partes, e tornou mais completa usando esses arquivos em Delphi XE
:. dsconst.h
, dspickle.h
, dsxml.h
Por favor, PM ou comentário, se você tem adições.
Os arquivos XSD abaixo parece funcionar razoavelmente até agora; se você tiver XML TClientDataSet que não está validando com isso, por favor me escreva seu XML (Google me ou colocar um comentário abaixo para o meu endereço de e-mail).
Primeiro, o CDS.xsd
arquivo, que inclui o CDS_METADATA_FIELDS_include.xsd
arquivo mais adiante.
Ela define a estrutura básica de um documento XML TClientDataSet: DATAPACKET
, contendo METADATA
e ROWDATA
, onde METADATA
contém FIELDS
e PARAMS
, e ROWDATA
contém elementos ROW
:
<?xml version="1.0" encoding="UTF-8"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:include schemaLocation="CDS_METADATA_FIELDS_include.xsd"/>
<!-- DATAPACKET/datapacket -->
<xs:element name="DATAPACKET" type="datapacket"/>
<xs:complexType name="datapacket">
<xs:sequence>
<xs:element ref="METADATA"/>
<xs:element ref="ROWDATA"/>
</xs:sequence>
<xs:attribute name="Version" type="xs:NMTOKEN" use="required"/>
</xs:complexType>
<!-- METADATA/metadata -->
<xs:element name="METADATA" type="metadata"/>
<xs:complexType name="metadata">
<xs:sequence>
<xs:element ref="FIELDS"/>
<xs:element ref="PARAMS"/>
</xs:sequence>
</xs:complexType>
<!-- PARAMS/params -->
<xs:element name="PARAMS" type="params"/>
<xs:complexType name="params">
<xs:attribute name="MD_FIELDLINKS" type="xs:string" use="optional"/>
<xs:attribute name="DEFAULT_ORDER" type="xs:positiveInteger"/>
<xs:attribute name="LCID" type="xs:positiveInteger"/>
<xs:attribute name="CHANGE_LOG" type="xs:string" use="optional"/>
<xs:attribute name="PRIMARY_KEY" type="xs:positiveInteger" use="optional"/>
</xs:complexType>
<!-- ROWDATA/rowdata -->
<xs:element name="ROWDATA" type="rowdata"/>
<xs:complexType name="rowdata">
<xs:sequence>
<xs:element ref="ROW" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<!-- ROW/row -->
<xs:element name="ROW" type="row"/>
<xs:complexType name="row">
<xs:sequence>
<xs:any namespace="##any" processContents="lax" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<xs:attribute name="RowState" type="xs:NMTOKEN" use="optional"/>
<xs:anyAttribute namespace="##any" processContents="lax"/>
</xs:complexType>
</xs:schema>
Note que os elementos ROW
são muito vagamente digitado, como eles vão conter nomes de atributos que são definidos de forma dinâmica.
Em seguida, a CDS_METADATA_FIELDS_include.xsd
arquivo que contém os dados de meta subjacentes utilizadas pelos elementos FIELDS
e PARAMS
.
Ele ainda não está totalmente completa, como eu não encontrei arquivos CDS XML contendo as palavras-chave mencionadas nos comentários abaixo.
<?xml version="1.0" encoding="UTF-8"?>
<!-- include portion of the METADATA FIELDS that CDS uses -->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<!-- FIELDS/fields -->
<xs:element name="FIELDS" type="fields"/>
<xs:complexType name="fields">
<xs:sequence>
<xs:element ref="FIELD" maxOccurs="unbounded"/>
</xs:sequence>
</xs:complexType>
<!-- FIELD/field -->
<xs:element name="FIELD" type="field"/>
<xs:complexType name="field">
<xs:sequence>
<xs:element ref="PARAM" minOccurs="0"/>
<!-- FIELDS is for nested datasets -->
<xs:element ref="FIELDS" minOccurs="0" maxOccurs="unbounded"/>
<!-- PARAMS is for nested datasets -->
<xs:element name="PARAMS" type="fieldParams" minOccurs="0" maxOccurs="unbounded"/>
</xs:sequence>
<!-- fieldname is used when the DBMS allows for non-identifier characters (like spaces) in fieldnames -->
<xs:attribute name="fieldname" use="optional" type="xs:string"/>
<xs:attribute name="fieldtype" use="required" type="FIELDTYPE"/>
<xs:attribute name="SUBTYPE" use="optional" type="subtype"/>
<!-- DECIMALS is for BCD -->
<xs:attribute name="DECIMALS" type="xs:positiveInteger" use="optional"/>
<!-- WIDTH is for Character, BCD, Bytes and Unicode -->
<xs:attribute name="WIDTH" type="xs:positiveInteger" use="optional"/>
<xs:attribute name="attrname" type="xs:Name" use="required"/>
<!-- need to incorporate these; probably as attributes as FIELD :
#define szUNIQUE_KEY "UNIQUE_KEY"
#define szSERVER_COL "SERVER_COL"
#define szCONSTRAINTS "CONSTRAINTS"
#define szDATASET_CONTEXT "DATASET_CONTEXT"
#define szDATASET_DELTA "DATASET_DELTA"
#define szREADONLY "READONLY"
#define szBDEDOMX "BDEDOMAIN_X"
#define szBDERECX "BDERECORD_X"
#define szBDEDEFX "BDEDEFAULT_X"
#define szAUTOINCVALUE "AUTOINCVALUE"
#define szELEMENTS "ELEMENTS"
#define szTABLENAME "TABLENAME"
#define szTYPENAME "TYPENAME"
#define szUPDATEMODE "UPDATEMODE"
#define szMD_SEMANTICS "MD_SEMANTICS"
#define szCALCULATED "CALCULATED"
#define szFIELDNAME "FIELDNAME"
-->
</xs:complexType>
<!-- fieldParams -->
<xs:complexType name="fieldParams">
<xs:attribute name="DEFAULT_ORDER" type="xs:positiveInteger"/>
<xs:attribute name="PRIMARY_KEY" type="xs:positiveInteger"/>
<xs:attribute name="LCID" type="xs:positiveInteger"/>
</xs:complexType>
<!-- FIELDTYPE -->
<xs:simpleType name="FIELDTYPE">
<xs:restriction base="xs:Name">
<!-- observed in real life CDS XML: -->
<xs:enumeration value="byte"/>
<!-- from Delphi XE file dsxml.h: -->
<xs:enumeration value="i1"/>
<xs:enumeration value="i2"/>
<xs:enumeration value="i4"/>
<xs:enumeration value="i8"/>
<xs:enumeration value="ui1"/>
<xs:enumeration value="ui2"/>
<xs:enumeration value="ui4"/>
<xs:enumeration value="ui8"/>
<xs:enumeration value="r4"/>
<xs:enumeration value="r8"/>
<xs:enumeration value="r10"/>
<!-- szXMLFloat/szXMLNumber <xs:enumeration value="r8"/> -->
<xs:enumeration value="fixed"/>
<xs:enumeration value="fixedFMT"/>
<xs:enumeration value="boolean"/>
<xs:enumeration value="date"/>
<xs:enumeration value="dateTime"/>
<xs:enumeration value="time"/>
<xs:enumeration value="array"/>
<xs:enumeration value="struct"/>
<xs:enumeration value="nested"/>
<xs:enumeration value="string.uni"/>
<xs:enumeration value="string"/>
<xs:enumeration value="bin.hex"/>
<xs:enumeration value="IntArray"/>
<xs:enumeration value="UIntArray"/>
<xs:enumeration value="SQLdateTime"/>
<xs:enumeration value="SQLdateTimeOffset"/>
</xs:restriction>
</xs:simpleType>
<!-- subtype -->
<xs:simpleType name="subtype">
<xs:restriction base="xs:Name">
<xs:enumeration value="Text"/>
<xs:enumeration value="Binary"/>
<xs:enumeration value="Formatted"/>
<xs:enumeration value="Ole"/>
<xs:enumeration value="Graphics"/>
<xs:enumeration value="dBASEOle"/>
<xs:enumeration value="TypedBinary"/>
<xs:enumeration value="Money"/>
<xs:enumeration value="Autoinc"/>
<xs:enumeration value="AccessOle"/>
<xs:enumeration value="HMemo"/>
<xs:enumeration value="HBinary"/>
<xs:enumeration value="ADTNestedTable"/>
<xs:enumeration value="FixedChar"/>
<xs:enumeration value="Reference"/>
<xs:enumeration value="BFile"/>
<xs:enumeration value="ADTDate"/>
<xs:enumeration value="Guid"/>
<xs:enumeration value="WideText"/>
<!-- Binary is required for fieldtype="bin.hex" -->
<!-- FixedChar is required for fieldtype="string" when the field is CHAR (but not NCHAR) -->
<!-- Guid is required for fieldtype="string" when the field is GUID -->
<!-- Text is required for fieldtype="bin.hex" when the underlying field is TEXT or NTEXT (memo?) -->
<!-- Money is required for fieldtype="float" when the underlying field is CURRENCY -->
</xs:restriction>
</xs:simpleType>
<!-- PARAM/param -->
<xs:element name="PARAM" type="param"/>
<xs:complexType name="param">
<xs:attribute name="Name" type="paramName" use="required"/>
<!-- two forms of Value are possible; xs:Name is for ORIGIN; xs:postiveInteger is for PROVFLAGS (in combination with Type)
<xs:attribute name="Value" type="xs:Name" use="required"/>
<xs:attribute name="Value" type="xs:postiveInteger" use="required"/>
-->
<xs:attribute name="Value" type="xs:string" use="required"/>
<xs:attribute name="Type" type="FIELDTYPE" use="optional"/>
<xs:attribute name="Roundtrip" type="xs:Name" use="required" fixed="True"/>
</xs:complexType>
<!-- paramName -->
<xs:simpleType name="paramName">
<xs:restriction base="xs:Name">
<xs:enumeration value="ORIGIN"/>
<xs:enumeration value="PROVFLAGS"/>
</xs:restriction>
</xs:simpleType>
</xs:schema>
Cumprimentos.
Outras dicas
Bem, eu não poderia encontrar um quer, então eu usei este site para gerar esse esquema baseado em um arquivo XML ClientDataSet.
<?xml version="1.0" encoding="UTF-8" ?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
<xs:element name="DATAPACKET">
<xs:complexType>
<xs:sequence>
<xs:element ref="METADATA" />
<xs:element ref="ROWDATA" />
</xs:sequence>
<xs:attribute name="Version" type="xs:NMTOKEN" use="required" />
</xs:complexType>
</xs:element>
<xs:element name="FIELD">
<xs:complexType>
<xs:attribute name="fieldtype" type="xs:NMTOKEN" use="required" />
<xs:attribute name="WIDTH" type="xs:NMTOKEN" use="optional" />
<xs:attribute name="attrname" type="xs:NMTOKEN" use="required" />
<xs:attribute name="required" type="xs:NMTOKEN" use="optional" />
</xs:complexType>
</xs:element>
<xs:element name="FIELDS">
<xs:complexType>
<xs:sequence>
<xs:element ref="FIELD" maxOccurs="unbounded" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="METADATA">
<xs:complexType>
<xs:sequence>
<xs:element ref="FIELDS" />
<xs:element ref="PARAMS" />
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="PARAMS">
<xs:complexType>
<xs:attribute name="CHANGE_LOG" type="xs:string" use="required" />
</xs:complexType>
</xs:element>
<xs:element name="ROW">
<xs:complexType>
</xs:complexType>
</xs:element>
<xs:element name="ROWDATA">
<xs:complexType>
<xs:sequence>
<xs:element ref="ROW" maxOccurs="unbounded" />
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
Eu sou um novato total em Delphi, mas teve de lidar com a análise de um TClientDataSet em formato XML. Eu também precisava de uma lista de todos os valores possíveis para o tipo de campo. Fiz alguma escavação na fonte de Delphi e veio com esta lista.
Se você quiser incluir os tipos de campo no esquema, em seguida, você deve incluir todos os tipos listados aqui:
<xs:enumeration value="string" />
<xs:enumeration value="id" />
<xs:enumeration value="idref" />
<xs:enumeration value="idrefs" />
<xs:enumeration value="entity" />
<xs:enumeration value="entities" />
<xs:enumeration value="nmtoken" />
<xs:enumeration value="nmtokens" />
<xs:enumeration value="number" />
<xs:enumeration value="int" />
<xs:enumeration value="enumeration" />
<xs:enumeration value="notation" />
<xs:enumeration value="fixed" />
<xs:enumeration value="boolean" />
<xs:enumeration value="dateTime" />
<xs:enumeration value="dateTime.tz" />
<xs:enumeration value="date" />
<xs:enumeration value="time" />
<xs:enumeration value="time.tz" />
<xs:enumeration value="i1" />
<xs:enumeration value="byte" />
<xs:enumeration value="i2" />
<xs:enumeration value="i4" />
<xs:enumeration value="i8" />
<xs:enumeration value="ui1" />
<xs:enumeration value="ui2" />
<xs:enumeration value="ui4" />
<xs:enumeration value="ui8" />
<xs:enumeration value="r4" />
<xs:enumeration value="r8" />
<xs:enumeration value="float" />
<xs:enumeration value="char" />
<xs:enumeration value="uuid" />
<xs:enumeration value="bin.hex" />
<xs:enumeration value="bin.base64" />
Obrigado por uma fazendo um bom trabalho de definição deste esquema. Isso ajuda muito.