Qualcuno che ha un XSD parziale che descrive la sezione METADATA dei file XML Delphi TClientDataSet?

Question

So che non puoi descrivere completamente l'XML che TClientDataSet con uno schema XSD, poiché gli elementi ROW hanno attributi che hanno nomi che variano con il contenuto.

Tuttavia, la sezione METADATA di tale XML dovrebbe essere.

Quindi: c'è qualcuno che ha un XSD (parziale) che descrive la porzione METADATA dell'XML che può essere salvata con Delphi TClientDataSets?

Saluti.

PS:

Grazie per i puntatori a XML - > strumenti / siti di conversione XSD; Avrei dovuto scrivere che l'ho fatto anch'io, ma che generare quell'XSD in modo corretto (cioè uno che copre tutte le possibilità) avrò bisogno di input XML che copra tutte le possibilità (come roundtrip, rowstate, ecc.). Proverò a trovare un XSD decente in quel modo e pubblicarlo qui.

Answer 1

Modifica
Dividere l'XSD in due parti e renderlo più completo utilizzando questi file in Delphi XE: dsconst.h, dspickle.h, dsxml.h.
Per favore, PM o commenta se hai aggiunte.

I file XSD qui sotto sembrano funzionare ragionevolmente finora; se hai TClientDataSet XML che non convalida con questo, inviami via email il tuo XML (Google me o metti un commento qui sotto per il mio indirizzo di posta).

Prima il file CDS.xsd, che include il file CDS_METADATA_FIELDS_include.xsd più avanti.
Definisce la struttura di base di un documento XML TClientDataSet: DATAPACKET, contenente METADATA e ROWDATA, dove FIELDS contiene PARAMS e ROW e <=> contiene <=> elementi:

<?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>

Nota che <=> gli elementi sono tipizzati in modo molto approssimativo, poiché conterranno nomi di attributi che sono definiti dinamicamente.

Quindi il file <=> che contiene i metadati sottostanti utilizzati dagli elementi <=> e <=>.
Non è ancora completamente completo, poiché non ho trovato i file XML CDS contenenti le parole chiave menzionate nei commenti seguenti.

<?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>

Saluti.

Answer 2

Beh, non sono riuscito a trovarne neanche uno, quindi ho usato questo sito web per generare questo schema basato su un file 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>

Answer 3

Sono un principiante assoluto in Delphi, ma ho dovuto occuparmi dell'analisi di un TClientDataSet in formato XML. Avevo anche bisogno di un elenco di tutti i possibili valori per il tipo di campo. Qualcuno ha scavato nella fonte di Delphi e ne è uscito con questo elenco.

Se si desidera includere i tipi di campo nello schema, è necessario includere tutti i tipi elencati qui:

<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" />

Grazie per aver fatto un buon lavoro nel definire questo schema. Questo aiuta molto.