doc/asn.xml

   1 <!-- $Id: asn.xml,v 1.12 2001-10-26 20:13:44 adam Exp $ -->
   2  <chapter id="asn"><title>The Z39.50 ASN.1 Module</title>
   3   <sect1 id="asn.introduction"><title>Introduction</title>
   4    <para>
   5     The &asn; module provides you with a set of C struct definitions for the
   6     various PDUs of the Z39.50 protocol, as well as for the complex types
   7     appearing within the PDUs. For the primitive data types, the C
   8     representation often takes the form of an ordinary C language type,
   9     such as <literal>int</literal>. For ASN.1 constructs that have no direct
  10     representation in C, such as general octet strings and bit strings,
  11     the &odr; module (see section <link linkend="odr">The ODR Module</link>)
  12     provides auxiliary definitions.
  13    </para>
  14    <para>
  15     The &asn; module is located in sub directory <filename>z39.50</filename>.
  16     There you'll find C files that implements encoders and decoders for the
  17     Z39.50 types. You'll also find the protocol definitions:
  18     <filename>z3950v3.asn</filename>, <filename>esupdate.asn</filename>,
  19     and others.
  20    </para>
  21   </sect1>
  22   <sect1 id="asn.preparing"><title>Preparing PDUs</title>
  23
  24    <para>
  25     A structure representing a complex ASN.1 type doesn't in itself contain the
  26     members of that type. Instead, the structure contains
  27     <emphasis>pointers</emphasis> to the members of the type.
  28     This is necessary, in part, to allow a mechanism for specifying which
  29     of the optional structure (SEQUENCE) members are present, and which
  30     are not. It follows that you will need to somehow provide space for
  31     the individual members of the structure, and set the pointers to
  32     refer to the members.
  33    </para>
  34    <para>
  35     The conversion routines don't care how you allocate and maintain your
  36     C structures - they just follow the pointers that you provide.
  37     Depending on the complexity of your application, and your personal
  38     taste, there are at least three different approaches that you may take
  39     when you allocate the structures.
  40    </para>
  41
  42    <para>
  43     You can use static or automatic local variables in the function that
  44     prepares the PDU. This is a simple approach, and it provides the most
  45     efficient form of memory management. While it works well for flat
  46     PDUs like the InitReqest, it will generally not be sufficient for say,
  47     the generation of an arbitrarily complex RPN query structure.
  48    </para>
  49    <para>
  50     You can individually create the structure and its members using the
  51     <function>malloc(2)</function> function. If you want to ensure that
  52     the data is freed when it is no longer needed, you will have to
  53     define a function that individually releases each member of a
  54     structure before freeing the structure itself.
  55    </para>
  56    <para>
  57     You can use the <function>odr_malloc()</function> function (see section
  58     <link linkend="odr-use">Using ODR</link> for details). When you use
  59     <function>odr_malloc()</function>, you can release all of the
  60     allocated data in a single operation, independent of any pointers and
  61     relations between the data. <function>odr_malloc()</function> is based on a
  62     &quot;nibble-memory&quot;
  63     scheme, in which large portions of memory are allocated, and then
  64     gradually handed out with each call to <function>odr_malloc()</function>.
  65     The next time you call <function>odr_reset()</function>, all of the
  66     memory allocated since the last call is recycled for future use (actually,
  67     it is placed on a free-list).
  68    </para>
  69    <para>
  70     You can combine all of the methods described here. This will often be
  71     the most practical approach. For instance, you might use
  72     <function>odr_malloc()</function> to allocate an entire structure and
  73     some of its elements, while you leave other elements pointing to global
  74     or per-session default variables.
  75    </para>
  76
  77    <para>
  78     The &asn; module provides an important aid in creating new PDUs. For
  79     each of the PDU types (say, <function>Z_InitRequest</function>), a
  80     function is provided that allocates and initializes an instance of
  81     that PDU type for you. In the case of the InitRequest, the function is
  82     simply named <function>zget_InitRequest()</function>, and it sets up
  83     reasonable default value for all of the mandatory members. The optional
  84     members are generally initialized to null pointers. This last aspect
  85     is very important: it ensures that if the PDU definitions are
  86     extended after you finish your implementation (to accommodate
  87     new versions of the protocol, say), you won't get into trouble with
  88     uninitialized pointers in your structures. The functions use
  89     <function>odr_malloc()</function> to
  90     allocate the PDUs and its members, so you can free everything again with a
  91     single call to <function>odr_reset()</function>. We strongly recommend
  92     that you use the <literal>zget_*</literal>
  93     functions whenever you are preparing a PDU (in a C++ API, the
  94     <literal>zget_</literal>
  95     functions would probably be promoted to constructors for the
  96     individual types).
  97    </para>
  98    <para>
  99    The prototype for the individual PDU types generally look like this:
 100    </para>
 101    <synopsis>
 102     Z_&lt;type> *zget_&lt;type>(ODR o);
 103    </synopsis>
 104
 105    <para>
 106     eg.:
 107    </para>
 108
 109    <synopsis>
 110     Z_InitRequest *zget_InitRequest(ODR o);
 111    </synopsis>
 112
 113    <para>
 114    The &odr; handle should generally be your encoding stream, but it
 115     needn't be.
 116    </para>
 117    <para>
 118    As well as the individual PDU functions, a function
 119     <function>zget_APDU()</function> is provided, which allocates
 120     a top-level Z-APDU of the type requested:
 121    </para>
 122
 123    <synopsis>
 124     Z_APDU *zget_APDU(ODR o, int which);
 125    </synopsis>
 126
 127    <para>
 128     The <varname>which</varname> parameter is (of course) the discriminator
 129     belonging to the <varname>Z_APDU</varname> <literal>CHOICE</literal> type.
 130     All of the interface described here is provided by the &asn; module, and
 131     you access it through the <filename>proto.h</filename> header file.
 132
 133    </para>
 134   </sect1>
 135   <sect1 id="asn.oid"><title id="oid">Object Identifiers</title>
 136   <para>
 137     When you refer to object identifiers in your application, you need to
 138     be aware that SR and Z39.50 use two different set of OIDs to refer to
 139     the same objects. To handle this easily, &yaz; provides a utility module
 140     to &asn; which provides an internal representation of the OIDs used in
 141     both protocols. Each oid is described by a structure:
 142    </para>
 143
 144    <screen>
 145 typedef struct oident
 146 {
 147     enum oid_proto proto;
 148     enum oid_class class;
 149     enum oid_value value;
 150     int oidsuffix[OID_SIZE];
 151     char *desc;
 152 } oident;
 153    </screen>
 154
 155    <para>
 156     The <literal>proto</literal> field can be set to either
 157     <literal>PROTO_SR</literal> or <literal>PROTO_Z3950</literal>.
 158     The <literal>class</literal> might be, say,
 159     <literal>CLASS_RECSYN</literal>, and the <literal>value</literal> might be
 160     <literal>VAL_USMARC</literal> for the USMARC record format. Functions
 161    </para>
 162
 163    <screen>
 164 int *oid_ent_to_oid(struct oident *ent, int *dst);
 165 struct oident *oid_getentbyoid(int *o);
 166    </screen>
 167
 168    <para>
 169     are provided to map between object identifiers and database entries.
 170     If you store a member of the <literal>oid_proto</literal> type in
 171     your association state information, it's a simple matter, at runtime,
 172     to generate the correct OID when you need it. For decoding, you can
 173     simply ignore the proto field, or if you're strict, you can verify
 174     that your peer is using the OID family from the correct protocol.
 175     The <literal>desc</literal> field is a short, human-readable name
 176     for the PDU, useful mainly for diagnostic output.
 177    </para>
 178
 179    <note>
 180     <para>
 181      The old function <function>oid_getoidbyent</function> still exists but
 182      is not thread safe. Use <function>oid_ent_to_oid</function> instead
 183      and pass an array of size <literal>OID_SIZE</literal>.
 184     </para>
 185    </note>
 186
 187    <note>
 188     <para>
 189      Plans are underway to merge the two protocols into a single
 190      definition, with one set of object identifiers. When this happens, the
 191      oid module will no longer be required to support protocol
 192      independence, but it should still be useful as a simple OID database.
 193     </para>
 194    </note>
 195
 196   </sect1>
 197   <sect1 id="asn.external"><title>EXTERNAL Data</title>
 198
 199    <para>
 200     In order to achieve extensibility and adaptability to different
 201     application domains, the new version of the protocol defines many
 202     structures outside of the main ASN.1 specification, referencing them
 203     through ASN.1 EXTERNAL constructs. To simplify the construction and
 204     access to the externally referenced data, the &asn; module defines a
 205     specialized version of the EXTERNAL construct, called
 206     <literal>Z_External</literal>.It is defined thus:
 207    </para>
 208
 209    <screen>
 210 typedef struct Z_External
 211 {
 212     Odr_oid *direct_reference;
 213     int *indirect_reference;
 214     char *descriptor;
 215     enum
 216     {
 217         /* Generic types */
 218         Z_External_single = 0,
 219         Z_External_octet,
 220         Z_External_arbitrary,
 221
 222         /* Specific types */
 223         Z_External_SUTRS,
 224         Z_External_explainRecord,
 225         Z_External_resourceReport1,
 226         Z_External_resourceReport2
 227
 228     ...
 229
 230     } which;
 231     union
 232     {
 233         /* Generic types */
 234         Odr_any *single_ASN1_type;
 235         Odr_oct *octet_aligned;
 236         Odr_bitmask *arbitrary;
 237
 238         /* Specific types */
 239         Z_SUTRS *sutrs;
 240         Z_ExplainRecord *explainRecord;
 241         Z_ResourceReport1 *resourceReport1;
 242         Z_ResourceReport2 *resourceReport2;
 243
 244         ...
 245
 246     } u;
 247 } Z_External;
 248    </screen>
 249
 250    <para>
 251     When decoding, the &asn; module will attempt to determine which
 252     syntax describes the data by looking at the reference fields
 253     (currently only the direct-reference). For ASN.1 structured data, you
 254     need only consult the <literal>which</literal> field to determine the
 255     type of data. You can the access  the data directly through the union.
 256     When constructing data for encoding, you set the union pointer to point
 257     to the data, and set the <literal>which</literal> field accordingly.
 258     Remember also to set the direct (or indirect) reference to the correct
 259     OID for the data type.
 260     For non-ASN.1 data such as MARC records, use the
 261     <literal>octet_aligned</literal> arm of the union.
 262    </para>
 263
 264    <para>
 265     Some servers return ASN.1 structured data values (eg. database
 266     records) as BER-encoded records placed in the
 267     <literal>octet-aligned</literal> branch of the EXTERNAL CHOICE.
 268     The ASN-module will <emphasis>not</emphasis> automatically decode
 269     these records. To help you decode the records in the application, the
 270     function
 271    </para>
 272
 273    <screen>
 274    Z_ext_typeent *z_ext_gettypebyref(oid_value ref);
 275    </screen>
 276
 277    <para>
 278     Can be used to retrieve information about the known, external data
 279     types. The function return a pointer to a static area, or NULL, if no
 280     match for the given direct reference is found. The
 281     <literal>Z_ext_typeent</literal>
 282     is defined as:
 283    </para>
 284
 285    <screen>
 286 typedef struct Z_ext_typeent
 287 {
 288     oid_value dref;    /* the direct-reference OID value. */
 289     int what;          /* discriminator value for the external CHOICE */
 290     Odr_fun fun;       /* decoder function */
 291 } Z_ext_typeent;
 292    </screen>
 293
 294    <para>
 295     The <literal>what</literal> member contains the
 296     <literal>Z_External</literal> union discriminator value for the
 297     given type: For the SUTRS record syntax, the value would be
 298     <literal>Z_External_sutrs</literal>.
 299     The <literal>fun</literal> member contains a pointer to the
 300     function which encodes/decodes the given type. Again, for the SUTRS
 301     record syntax, the value of <literal>fun</literal> would be
 302     <literal>z_SUTRS</literal> (a function pointer).
 303    </para>
 304
 305    <para>
 306     If you receive an EXTERNAL which contains an octet-string value that
 307     you suspect of being an ASN.1-structured data value, you can use
 308     <literal>z_ext_gettypebyref</literal> to look for the provided
 309     direct-reference.
 310     If the return value is different from NULL, you can use the provided
 311     function to decode the BER string (see section <link linkend="odr-use">
 312      Using ODR</link>).
 313    </para>
 314
 315    <para>
 316     If you want to <emphasis>send</emphasis> EXTERNALs containing
 317     ASN.1-structured values in the occtet-aligned branch of the CHOICE, this
 318     is possible too. However, on the encoding phase, it requires a somewhat
 319     involved juggling around of the various buffers involved.
 320    </para>
 321    <para>
 322     If you need to add new, externally defined data types, you must update
 323     the struct above, in the source file <filename>prt-ext.h</filename>, as
 324     well as the encoder/decoder in the file <filename>prt-ext.c</filename>.
 325     When changing the latter, remember to update both the
 326     <literal>arm</literal> arrary and the list
 327     <literal>type_table</literal>, which drives the CHOICE biasing that
 328     is necessary to tell the different, structured types apart
 329     on decoding.
 330    </para>
 331
 332    <note>
 333     <para>
 334      Eventually, the EXTERNAL processing will most likely
 335      automatically insert the correct OIDs or indirect-refs. First,
 336      however, we need to determine how application-context management
 337      (specifically the presentation-context-list) should fit into the
 338      various modules.
 339     </para>
 340    </note>
 341
 342   </sect1>
 343   <sect1 id="asn.pdu"><title>PDU Contents Table</title>
 344
 345   <para>
 346     We include, for reference, a listing of the fields of each top-level
 347     PDU, as well as their default settings.
 348    </para>
 349
 350    <table frame="top"><title>Default settings for PDU Initialize Request</title>
 351     <tgroup cols="3">
 352      <colspec colwidth="7*" colname="field"></colspec>
 353      <colspec colwidth="5*" colname="type"></colspec>
 354      <colspec colwidth="7*" colname="value"></colspec>
 355     <thead>
 356      <row>
 357       <entry>Field</entry>
 358       <entry>Type</entry>
 359       <entry>Default Value</entry>
 360      </row>
 361     </thead>
 362     <tbody>
 363      <row><entry>
 364        referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 365       </entry></row>
 366      <row><entry>
 367        protocolVersion</entry><entry>Odr_bitmask</entry><entry>Empty bitmask
 368       </entry></row>
 369      <row><entry>
 370        options</entry><entry>Odr_bitmask</entry><entry>Empty bitmask
 371       </entry></row>
 372      <row><entry>
 373        preferredMessageSize</entry><entry>int</entry><entry>30*1024
 374       </entry></row>
 375      <row><entry>
 376        maximumRecordSize</entry><entry>int</entry><entry>30*1024
 377       </entry></row>
 378      <row><entry>
 379        idAuthentication</entry><entry>Z_IdAuthentication</entry><entry>NULL
 380       </entry></row>
 381      <row><entry>
 382        implementationId</entry><entry>char*</entry><entry>"81"
 383       </entry></row>
 384      <row><entry>
 385        implementationName</entry><entry>char*</entry><entry>"YAZ"
 386       </entry></row>
 387      <row><entry>
 388        implementationVersion</entry><entry>char*</entry><entry>YAZ_VERSION
 389       </entry></row>
 390      <row><entry>
 391        userInformationField</entry><entry>Z_UserInformation</entry><entry>NULL
 392       </entry></row>
 393      <row><entry>
 394        otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 395       </entry></row>
 396     </tbody>
 397    </tgroup>
 398   </table>
 399
 400   <table frame="top"><title>Default settings for PDU Initialize
 401     Response</title>
 402    <tgroup cols="3">
 403      <colspec colwidth="7*" colname="field"></colspec>
 404      <colspec colwidth="5*" colname="type"></colspec>
 405      <colspec colwidth="7*" colname="value"></colspec>
 406     <thead>
 407       <row>
 408        <entry>Field</entry>
 409        <entry>Type</entry>
 410        <entry>Default Value</entry>
 411       </row>
 412      </thead>
 413      <tbody>
 414       <row><entry>
 415         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 416        </entry></row>
 417       <row><entry>
 418         protocolVersion</entry><entry>Odr_bitmask</entry><entry>Empty bitmask
 419        </entry></row>
 420       <row><entry>
 421         options</entry><entry>Odr_bitmask</entry><entry>Empty bitmask
 422        </entry></row>
 423       <row><entry>
 424         preferredMessageSize</entry><entry>int</entry><entry>30*1024
 425        </entry></row>
 426       <row><entry>
 427         maximumRecordSize</entry><entry>int</entry><entry>30*1024
 428        </entry></row>
 429       <row><entry>
 430         result</entry><entry>bool_t</entry><entry>TRUE
 431        </entry></row>
 432       <row><entry>
 433         implementationId</entry><entry>char*</entry><entry>"id)"
 434        </entry></row>
 435       <row><entry>
 436         implementationName</entry><entry>char*</entry><entry>"YAZ"
 437        </entry></row>
 438       <row><entry>
 439         implementationVersion</entry><entry>char*</entry><entry>YAZ_VERSION
 440        </entry></row>
 441       <row><entry>
 442         userInformationField</entry><entry>Z_UserInformation</entry><entry>NULL
 443        </entry></row>
 444       <row><entry>
 445         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 446        </entry></row>
 447      </tbody>
 448     </tgroup>
 449    </table>
 450
 451    <table frame="top"><title>Default settings for PDU Search Request</title>
 452     <tgroup cols="3">
 453      <colspec colwidth="7*" colname="field"></colspec>
 454      <colspec colwidth="5*" colname="type"></colspec>
 455      <colspec colwidth="7*" colname="value"></colspec>
 456      <thead>
 457       <row>
 458        <entry>Field</entry>
 459        <entry>Type</entry>
 460        <entry>Default Value</entry>
 461       </row>
 462      </thead>
 463      <tbody>
 464       <row><entry>
 465         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 466        </entry></row>
 467       <row><entry>
 468         smallSetUpperBound</entry><entry>int</entry><entry>0
 469        </entry></row>
 470       <row><entry>
 471         largeSetLowerBound</entry><entry>int</entry><entry>1
 472        </entry></row>
 473       <row><entry>
 474         mediumSetPresentNumber</entry><entry>int</entry><entry>0
 475        </entry></row>
 476       <row><entry>
 477         replaceIndicator</entry><entry>bool_t</entry><entry>TRUE
 478        </entry></row>
 479       <row><entry>
 480         resultSetName</entry><entry>char *</entry><entry>"default"
 481        </entry></row>
 482       <row><entry>
 483         num_databaseNames</entry><entry>int</entry><entry>0
 484        </entry></row>
 485       <row><entry>
 486         databaseNames</entry><entry>char **</entry><entry>NULL
 487        </entry></row>
 488       <row><entry>
 489         smallSetElementSetNames</entry><entry>Z_ElementSetNames
 490        </entry><entry>NULL
 491        </entry></row>
 492       <row><entry>
 493         mediumSetElementSetNames</entry><entry>Z_ElementSetNames
 494        </entry><entry>NULL
 495        </entry></row>
 496       <row><entry>
 497         preferredRecordSyntax</entry><entry>Odr_oid</entry><entry>NULL
 498        </entry></row>
 499       <row><entry>
 500         query</entry><entry>Z_Query</entry><entry>NULL
 501        </entry></row>
 502       <row><entry>
 503         additionalSearchInfo</entry><entry>Z_OtherInformation
 504        </entry><entry>NULL
 505        </entry></row>
 506       <row><entry>
 507         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 508        </entry></row>
 509      </tbody>
 510     </tgroup>
 511    </table>
 512
 513    <table frame="top"><title>Default settings for PDU Search Response</title>
 514     <tgroup cols="3">
 515      <colspec colwidth="7*" colname="field"></colspec>
 516      <colspec colwidth="5*" colname="type"></colspec>
 517      <colspec colwidth="7*" colname="value"></colspec>
 518      <thead>
 519       <row>
 520        <entry>Field</entry>
 521        <entry>Type</entry>
 522        <entry>Default Value</entry>
 523       </row>
 524      </thead>
 525      <tbody>
 526
 527       <row><entry>
 528         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 529        </entry></row>
 530       <row><entry>
 531         resultCount</entry><entry>int</entry><entry>0
 532        </entry></row>
 533       <row><entry>
 534         numberOfRecordsReturned</entry><entry>int</entry><entry>0
 535        </entry></row>
 536       <row><entry>
 537         nextResultSetPosition</entry><entry>int</entry><entry>0
 538        </entry></row>
 539       <row><entry>
 540         searchStatus</entry><entry>bool_t</entry><entry>TRUE
 541        </entry></row>
 542       <row><entry>
 543         resultSetStatus</entry><entry>int</entry><entry>NULL
 544        </entry></row>
 545       <row><entry>
 546         presentStatus</entry><entry>int</entry><entry>NULL
 547        </entry></row>
 548       <row><entry>
 549         records</entry><entry>Z_Records</entry><entry>NULL
 550        </entry></row>
 551       <row><entry>
 552         additionalSearchInfo</entry>
 553        <entry>Z_OtherInformation</entry><entry>NULL
 554        </entry></row>
 555       <row><entry>
 556         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 557        </entry></row>
 558      </tbody>
 559     </tgroup>
 560    </table>
 561
 562    <table frame="top"><title>Default settings for PDU Present Request</title>
 563     <tgroup cols="3">
 564      <colspec colwidth="7*" colname="field"></colspec>
 565      <colspec colwidth="5*" colname="type"></colspec>
 566      <colspec colwidth="7*" colname="value"></colspec>
 567      <thead>
 568       <row>
 569        <entry>Field</entry>
 570        <entry>Type</entry>
 571        <entry>Default Value</entry>
 572       </row>
 573      </thead>
 574      <tbody>
 575       <row><entry>
 576         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 577        </entry></row>
 578       <row><entry>
 579         resultSetId</entry><entry>char*</entry><entry>"default"
 580        </entry></row>
 581       <row><entry>
 582         resultSetStartPoint</entry><entry>int</entry><entry>1
 583        </entry></row>
 584       <row><entry>
 585         numberOfRecordsRequested</entry><entry>int</entry><entry>10
 586        </entry></row>
 587       <row><entry>
 588         num_ranges</entry><entry>int</entry><entry>0
 589        </entry></row>
 590       <row><entry>
 591         additionalRanges</entry><entry>Z_Range</entry><entry>NULL
 592        </entry></row>
 593       <row><entry>
 594         recordComposition</entry><entry>Z_RecordComposition</entry><entry>NULL
 595        </entry></row>
 596       <row><entry>
 597         preferredRecordSyntax</entry><entry>Odr_oid</entry><entry>NULL
 598        </entry></row>
 599       <row><entry>
 600         maxSegmentCount</entry><entry>int</entry><entry>NULL
 601        </entry></row>
 602       <row><entry>
 603         maxRecordSize</entry><entry>int</entry><entry>NULL
 604        </entry></row>
 605       <row><entry>
 606         maxSegmentSize</entry><entry>int</entry><entry>NULL
 607        </entry></row>
 608       <row><entry>
 609         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 610        </entry></row>
 611      </tbody>
 612     </tgroup>
 613    </table>
 614
 615    <table frame="top"><title>Default settings for PDU Present Response</title>
 616     <tgroup cols="3">
 617      <colspec colwidth="7*" colname="field"></colspec>
 618      <colspec colwidth="5*" colname="type"></colspec>
 619      <colspec colwidth="7*" colname="value"></colspec>
 620      <thead>
 621       <row>
 622        <entry>Field</entry>
 623        <entry>Type</entry>
 624        <entry>Default Value</entry>
 625       </row>
 626      </thead>
 627      <tbody>
 628       <row><entry>
 629         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 630        </entry></row>
 631       <row><entry>
 632         numberOfRecordsReturned</entry><entry>int</entry><entry>0
 633        </entry></row>
 634       <row><entry>
 635         nextResultSetPosition</entry><entry>int</entry><entry>0
 636        </entry></row>
 637       <row><entry>
 638         presentStatus</entry><entry>int</entry><entry>Z_PRES_SUCCESS
 639        </entry></row>
 640       <row><entry>
 641         records</entry><entry>Z_Records</entry><entry>NULL
 642        </entry></row>
 643       <row><entry>
 644         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 645        </entry></row>
 646      </tbody>
 647     </tgroup>
 648    </table>
 649
 650    <table frame="top"><title>Default settings for Delete Result Set Request
 651     </title>
 652     <tgroup cols="3">
 653      <colspec colwidth="7*" colname="field"></colspec>
 654      <colspec colwidth="5*" colname="type"></colspec>
 655      <colspec colwidth="7*" colname="value"></colspec>
 656      <thead>
 657       <row>
 658        <entry>Field</entry>
 659        <entry>Type</entry>
 660        <entry>Default Value</entry>
 661       </row>
 662      </thead>
 663      <tbody>
 664       <row><entry>referenceId
 665        </entry><entry>Z_ReferenceId</entry><entry>NULL
 666        </entry></row>
 667       <row><entry>
 668         deleteFunction</entry><entry>int</entry><entry>Z_DeleteRequest_list
 669        </entry></row>
 670       <row><entry>
 671         num_ids</entry><entry>int</entry><entry>0
 672        </entry></row>
 673       <row><entry>
 674         resultSetList</entry><entry>char**</entry><entry>NULL
 675        </entry></row>
 676       <row><entry>
 677         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 678        </entry></row>
 679      </tbody>
 680     </tgroup>
 681    </table>
 682
 683    <table frame="top"><title>Default settings for Delete Result Set Response
 684     </title>
 685     <tgroup cols="3">
 686      <colspec colwidth="7*" colname="field"></colspec>
 687      <colspec colwidth="5*" colname="type"></colspec>
 688      <colspec colwidth="7*" colname="value"></colspec>
 689      <thead>
 690       <row>
 691        <entry>Field</entry>
 692        <entry>Type</entry>
 693        <entry>Default Value</entry>
 694       </row>
 695      </thead>
 696      <tbody>
 697       <row><entry>
 698         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 699        </entry></row>
 700       <row><entry>
 701         deleteOperationStatus</entry><entry>int</entry>
 702        <entry>Z_DeleteStatus_success</entry></row>
 703       <row><entry>
 704         num_statuses</entry><entry>int</entry><entry>0
 705        </entry></row>
 706       <row><entry>
 707         deleteListStatuses</entry><entry>Z_ListStatus**</entry><entry>NULL
 708        </entry></row>
 709       <row><entry>
 710         numberNotDeleted</entry><entry>int</entry><entry>NULL
 711        </entry></row>
 712       <row><entry>
 713         num_bulkStatuses</entry><entry>int</entry><entry>0
 714        </entry></row>
 715       <row><entry>
 716         bulkStatuses</entry><entry>Z_ListStatus</entry><entry>NUL
 717         L</entry></row>
 718       <row><entry>
 719         deleteMessage</entry><entry>char*</entry><entry>NULL
 720        </entry></row>
 721       <row><entry>
 722         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 723        </entry></row>
 724      </tbody>
 725     </tgroup>
 726    </table>
 727
 728    <table frame="top"><title>Default settings for Scan Request
 729     </title>
 730     <tgroup cols="3">
 731      <colspec colwidth="7*" colname="field"></colspec>
 732      <colspec colwidth="5*" colname="type"></colspec>
 733      <colspec colwidth="7*" colname="value"></colspec>
 734      <thead>
 735       <row>
 736        <entry>Field</entry>
 737        <entry>Type</entry>
 738        <entry>Default Value</entry>
 739       </row>
 740      </thead>
 741      <tbody>
 742       <row><entry>
 743         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 744        </entry></row>
 745       <row><entry>
 746         num_databaseNames</entry><entry>int</entry><entry>0
 747        </entry></row>
 748       <row><entry>
 749         databaseNames</entry><entry>char**</entry><entry>NULL
 750        </entry></row>
 751       <row><entry>
 752         attributeSet</entry><entry>Odr_oid</entry><entry>NULL
 753        </entry></row>
 754       <row><entry>
 755         termListAndStartPoint</entry><entry>Z_AttributesPlus...
 756        </entry><entry>NULL</entry></row>
 757       <row><entry>
 758         stepSize</entry><entry>int</entry><entry>NULL
 759        </entry></row>
 760       <row><entry>
 761         numberOfTermsRequested</entry><entry>int</entry><entry>20
 762        </entry></row>
 763       <row><entry>
 764         preferredPositionInResponse</entry><entry>int</entry><entry>NULL
 765        </entry></row>
 766       <row><entry>
 767         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 768        </entry></row>
 769      </tbody>
 770     </tgroup>
 771    </table>
 772
 773    <table frame="top"><title>Default settings for Scan Response
 774     </title>
 775     <tgroup cols="3">
 776      <colspec colwidth="7*" colname="field"></colspec>
 777      <colspec colwidth="5*" colname="type"></colspec>
 778      <colspec colwidth="7*" colname="value"></colspec>
 779      <thead>
 780       <row>
 781        <entry>Field</entry>
 782        <entry>Type</entry>
 783        <entry>Default Value</entry>
 784       </row>
 785      </thead>
 786      <tbody>
 787
 788       <row><entry>
 789         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 790        </entry></row>
 791       <row><entry>
 792         stepSize</entry><entry>int</entry><entry>NULL
 793        </entry></row>
 794       <row><entry>
 795         scanStatus</entry><entry>int</entry><entry>Z_Scan_success
 796        </entry></row>
 797       <row><entry>
 798         numberOfEntriesReturned</entry><entry>int</entry><entry>0
 799        </entry></row>
 800       <row><entry>
 801         positionOfTerm</entry><entry>int</entry><entry>NULL
 802        </entry></row>
 803       <row><entry>
 804         entries</entry><entry>Z_ListEntris</entry><entry>NULL
 805        </entry></row>
 806       <row><entry>
 807         attributeSet</entry><entry>Odr_oid</entry><entry>NULL
 808        </entry></row>
 809       <row><entry>
 810         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 811        </entry></row>
 812      </tbody>
 813     </tgroup>
 814    </table>
 815
 816    <table frame="top"><title>Default settings for Trigger Resource
 817      Control Request </title>
 818     <tgroup cols="3">
 819      <colspec colwidth="7*" colname="field"></colspec>
 820      <colspec colwidth="5*" colname="type"></colspec>
 821      <colspec colwidth="7*" colname="value"></colspec>
 822      <thead>
 823       <row>
 824        <entry>Field</entry>
 825        <entry>Type</entry>
 826        <entry>Default Value</entry>
 827       </row>
 828      </thead>
 829      <tbody>
 830
 831       <row><entry>
 832         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 833        </entry></row>
 834       <row><entry>
 835         requestedAction</entry><entry>int</entry><entry>
 836         Z_TriggerResourceCtrl_resou..
 837        </entry></row>
 838       <row><entry>
 839         prefResourceReportFormat</entry><entry>Odr_oid</entry><entry>NULL
 840        </entry></row>
 841       <row><entry>
 842         resultSetWanted</entry><entry>bool_t</entry><entry>NULL
 843        </entry></row>
 844       <row><entry>
 845         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 846        </entry></row>
 847
 848      </tbody>
 849     </tgroup>
 850    </table>
 851
 852    <table frame="top"><title>Default settings for Resource
 853      Control Request</title>
 854     <tgroup cols="3">
 855      <colspec colwidth="7*" colname="field"></colspec>
 856      <colspec colwidth="5*" colname="type"></colspec>
 857      <colspec colwidth="7*" colname="value"></colspec>
 858      <thead>
 859       <row>
 860        <entry>Field</entry>
 861        <entry>Type</entry>
 862        <entry>Default Value</entry>
 863       </row>
 864      </thead>
 865      <tbody>
 866
 867       <row><entry>
 868         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 869        </entry></row>
 870       <row><entry>
 871         suspendedFlag</entry><entry>bool_t</entry><entry>NULL
 872        </entry></row>
 873       <row><entry>
 874         resourceReport</entry><entry>Z_External</entry><entry>NULL
 875        </entry></row>
 876       <row><entry>
 877         partialResultsAvailable</entry><entry>int</entry><entry>NULL
 878        </entry></row>
 879       <row><entry>
 880         responseRequired</entry><entry>bool_t</entry><entry>FALSE
 881        </entry></row>
 882       <row><entry>
 883         triggeredRequestFlag</entry><entry>bool_t</entry><entry>NULL
 884        </entry></row>
 885       <row><entry>
 886         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 887        </entry></row>
 888      </tbody>
 889     </tgroup>
 890    </table>
 891
 892    <table frame="top"><title>Default settings for Resource
 893      Control Response</title>
 894     <tgroup cols="3">
 895      <colspec colwidth="7*" colname="field"></colspec>
 896      <colspec colwidth="5*" colname="type"></colspec>
 897      <colspec colwidth="7*" colname="value"></colspec>
 898      <thead>
 899       <row>
 900        <entry>Field</entry>
 901        <entry>Type</entry>
 902        <entry>Default Value</entry>
 903       </row>
 904      </thead>
 905      <tbody>
 906
 907       <row><entry>
 908         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 909        </entry></row>
 910       <row><entry>
 911         continueFlag</entry><entry>bool_t</entry><entry>TRUE
 912        </entry></row>
 913       <row><entry>
 914         resultSetWanted</entry><entry>bool_t</entry><entry>NULL
 915        </entry></row>
 916       <row><entry>
 917         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 918        </entry></row>
 919      </tbody>
 920     </tgroup>
 921    </table>
 922
 923    <table frame="top"><title>Default settings for Access
 924      Control Request</title>
 925     <tgroup cols="3">
 926      <colspec colwidth="7*" colname="field"></colspec>
 927      <colspec colwidth="5*" colname="type"></colspec>
 928      <colspec colwidth="7*" colname="value"></colspec>
 929      <thead>
 930       <row>
 931        <entry>Field</entry>
 932        <entry>Type</entry>
 933        <entry>Default Value</entry>
 934       </row>
 935      </thead>
 936      <tbody>
 937
 938       <row><entry>
 939         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 940        </entry></row>
 941       <row><entry>
 942         which</entry><entry>enum</entry><entry>Z_AccessRequest_simpleForm;
 943        </entry></row>
 944       <row><entry>
 945         u</entry><entry>union</entry><entry>NULL
 946        </entry></row>
 947       <row><entry>
 948         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 949        </entry></row>
 950      </tbody>
 951     </tgroup>
 952    </table>
 953
 954    <table frame="top"><title>Default settings for Access
 955      Control Response</title>
 956     <tgroup cols="3">
 957      <colspec colwidth="7*" colname="field"></colspec>
 958      <colspec colwidth="5*" colname="type"></colspec>
 959      <colspec colwidth="7*" colname="value"></colspec>
 960      <thead>
 961       <row>
 962        <entry>Field</entry>
 963        <entry>Type</entry>
 964        <entry>Default Value</entry>
 965       </row>
 966      </thead>
 967      <tbody>
 968
 969       <row><entry>
 970         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
 971        </entry></row>
 972       <row><entry>
 973         which</entry><entry>enum</entry><entry>Z_AccessResponse_simpleForm
 974        </entry></row>
 975       <row><entry>
 976         u</entry><entry>union</entry><entry>NULL
 977        </entry></row>
 978       <row><entry>
 979         diagnostic</entry><entry>Z_DiagRec</entry><entry>NULL
 980        </entry></row>
 981       <row><entry>
 982         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
 983        </entry></row>
 984      </tbody>
 985     </tgroup>
 986    </table>
 987
 988    <table frame="top"><title>Default settings for Segment</title>
 989     <tgroup cols="3">
 990      <colspec colwidth="7*" colname="field"></colspec>
 991      <colspec colwidth="5*" colname="type"></colspec>
 992      <colspec colwidth="7*" colname="value"></colspec>
 993      <thead>
 994       <row>
 995        <entry>Field</entry>
 996        <entry>Type</entry>
 997        <entry>Default Value</entry>
 998       </row>
 999      </thead>
1000      <tbody>
1001
1002       <row><entry>
1003         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
1004        </entry></row>
1005       <row><entry>
1006         numberOfRecordsReturned</entry><entry>int</entry><entry>value=0
1007        </entry></row>
1008       <row><entry>
1009         num_segmentRecords</entry><entry>int</entry><entry>0
1010        </entry></row>
1011       <row><entry>
1012         segmentRecords</entry><entry>Z_NamePlusRecord</entry><entry>NULL
1013        </entry></row>
1014       <row><entry>otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
1015        </entry></row>
1016      </tbody>
1017     </tgroup>
1018    </table>
1019
1020    <table frame="top"><title>Default settings for Close</title>
1021     <tgroup cols="3">
1022      <colspec colwidth="7*" colname="field"></colspec>
1023      <colspec colwidth="5*" colname="type"></colspec>
1024      <colspec colwidth="7*" colname="value"></colspec>
1025      <thead>
1026       <row>
1027        <entry>Field</entry>
1028        <entry>Type</entry>
1029        <entry>Default Value</entry>
1030       </row>
1031      </thead>
1032      <tbody>
1033
1034       <row><entry>
1035         referenceId</entry><entry>Z_ReferenceId</entry><entry>NULL
1036        </entry></row>
1037       <row><entry>
1038         closeReason</entry><entry>int</entry><entry>Z_Close_finished
1039        </entry></row>
1040       <row><entry>
1041         diagnosticInformation</entry><entry>char*</entry><entry>NULL
1042        </entry></row>
1043       <row><entry>
1044         resourceReportFormat</entry><entry>Odr_oid</entry><entry>NULL
1045        </entry></row>
1046       <row><entry>
1047         resourceFormat</entry><entry>Z_External</entry><entry>NULL
1048        </entry></row>
1049       <row><entry>
1050         otherInfo</entry><entry>Z_OtherInformation</entry><entry>NULL
1051        </entry></row>
1052
1053      </tbody>
1054     </tgroup>
1055    </table>
1056
1057   </sect1>
1058  </chapter>
1059
1060  <!-- Keep this comment at the end of the file
1061  Local variables:
1062  mode: sgml
1063  sgml-omittag:t
1064  sgml-shorttag:t
1065  sgml-minimize-attributes:nil
1066  sgml-always-quote-attributes:t
1067  sgml-indent-step:1
1068  sgml-indent-data:t
1069  sgml-parent-document: "yaz.xml"
1070  sgml-local-catalogs: nil
1071  sgml-namecase-general:t
1072  End:
1073  -->