-<!-- $Id: tools.xml,v 1.35 2004-04-22 13:12:49 adam Exp $ -->
+<!-- $Id: tools.xml,v 1.38 2004-10-02 13:41:46 adam Exp $ -->
<chapter id="tools"><title>Supporting Tools</title>
<para>
<row>
<entry><literal>u=</literal><replaceable>value</replaceable></entry>
<entry>
- Use attribute. Common use attributes are
+ Use attribute (1). Common use attributes are
1 Personal-name, 4 Title, 7 ISBN, 8 ISSN, 30 Date,
62 Subject, 1003 Author), 1016 Any. Specify value
as an integer.
<row>
<entry><literal>r=</literal><replaceable>value</replaceable></entry>
<entry>
- Relation attribute. Common values are
+ Relation attribute (2). Common values are
1 <, 2 <=, 3 =, 4 >=, 5 >, 6 <>,
100 phonetic, 101 stem, 102 relevance, 103 always matches.
</entry>
<row>
<entry><literal>p=</literal><replaceable>value</replaceable></entry>
<entry>
- Position attribute. Values: 1 first in field, 2
+ Position attribute (3). Values: 1 first in field, 2
first in any subfield, 3 any position in field.
</entry>
</row>
<row>
<entry><literal>s=</literal><replaceable>value</replaceable></entry>
<entry>
- Structure attribute. Values: 1 phrase, 2 word,
+ Structure attribute (4). Values: 1 phrase, 2 word,
3 key, 4 year, 5 date, 6 word list, 100 date (un),
101 name (norm), 102 name (un), 103 structure, 104 urx,
105 free-form-text, 106 document-text, 107 local-number,
<row>
<entry><literal>t=</literal><replaceable>value</replaceable></entry>
<entry>
- Truncation attribute. Values: 1 right, 2 left,
+ Truncation attribute (5). Values: 1 right, 2 left,
3 left& right, 100 none, 101 process #, 102 regular-1,
103 regular-2, 104 CCL.
</entry>
<row>
<entry><literal>c=</literal><replaceable>value</replaceable></entry>
<entry>
- Completeness attribute. Values: 1 incomplete subfield,
+ Completeness attribute (6). Values: 1 incomplete subfield,
2 complete subfield, 3 complete field.
</entry>
</row>
</row>
<row><entry><literal>r=o</literal></entry><entry>
- Allows operators greather-than, less-than, ... equals and
- sets relation attribute accordingly (relation ordered).
+ Allows ranges and the operators greather-than, less-than, ...
+ equals.
+ This sets Bib-1 relation attribute accordingly (relation
+ ordered). A query construct is only treated as a range if
+ dash is used and that is surrounded by white-space. So
+ <literal>-1980</literal> is treated as term
+ <literal>"-1980"</literal> not <literal><= 1980</literal>.
+ If <literal>- 1980</literal> is used, however, that is
+ treated as a range.
+ </entry>
+ </row>
+
+ <row><entry><literal>r=r</literal></entry><entry>
+ Similar to <literal>r=o</literal> but assumes that terms
+ are non-negative (not prefixed with <literal>-</literal>).
+ Thus, a dash will always be treated as a range.
+ The construct <literal>1980-1990</literal> is
+ treated as a range with <literal>r=r</literal> but as a
+ single term <literal>"1980-1990"</literal> with
+ <literal>r=o</literal>. The special attribute
+ <literal>r=r</literal> is available in YAZ 2.0.24 or later.
</entry>
</row>
date u=30 r=o
</screen>
<para>
- Four qualifiers are defined - <literal>ti</literal>,
- <literal>au</literal>, <literal>ranked</literal> and
- <literal>date</literal>.
- </para>
- <para>
<literal>ti</literal> and <literal>au</literal> both set
structure attribute to phrase (s=1).
<literal>ti</literal>
<para>
Query
<screen>
- year > 1980
+ date > 1980
</screen>
- is a valid query, while
+ is a valid query. But
<screen>
ti > 1980
</screen>
be an alias for <replaceable>q1</replaceable>,
<replaceable>q2</replaceable>... such that the CCL
query <replaceable>q=x</replaceable> is equivalent to
- <replaceable>q1=x or w2=x or ...</replaceable>.
+ <replaceable>q1=x or q2=x or ...</replaceable>.
</para>
</sect4>
<synopsis>
#define CQL_NODE_ST 1
#define CQL_NODE_BOOL 2
-#define CQL_NODE_MOD 3
struct cql_node {
int which;
union {
struct {
char *index;
+ char *index_uri;
char *term;
char *relation;
+ char *relation_uri;
struct cql_node *modifiers;
- struct cql_node *prefixes;
} st;
struct {
char *value;
struct cql_node *left;
struct cql_node *right;
struct cql_node *modifiers;
- struct cql_node *prefixes;
} boolean;
- struct {
- char *name;
- char *value;
- struct cql_node *next;
- } mod;
} u;
};
</synopsis>
- There are three kinds of nodes, search term (ST), boolean (BOOL),
- and modifier (MOD).
+ There are two node types: search term (ST) and boolean (BOOL).
+ A modifier is treated as a search term too.
</para>
<para>
The search term node has five members:
If an index is unspecified for a search term,
<literal>index</literal> will be NULL.
</para>
+ <para>
+ <literal>index_uri</literal>: index URi for search term
+ or NULL if none could be resolved for the index.
+ </para>
</listitem>
<listitem>
<para>
</listitem>
<listitem>
<para>
- <literal>modifiers</literal>: relation modifiers for search
- term. The <literal>modifiers</literal> is a simple linked
- list (NULL for last entry). Each relation modifier node
- is of type <literal>MOD</literal>.
+ <literal>relation_uri</literal>: relation URI for search term.
</para>
</listitem>
<listitem>
<para>
- <literal>prefixes</literal>: index prefixes for search
- term. The <literal>prefixes</literal> is a simple linked
- list (NULL for last entry). Each prefix node
- is of type <literal>MOD</literal>.
+ <literal>modifiers</literal>: relation modifiers for search
+ term. The <literal>modifiers</literal> list itself of cql_nodes
+ each of type <literal>ST</literal>.
</para>
</listitem>
</itemizedlist>
<literal>modifiers</literal>: proximity arguments.
</para>
</listitem>
- <listitem>
- <para>
- <literal>prefixes</literal>: index prefixes.
- The <literal>prefixes</literal> is a simple linked
- list (NULL for last entry). Each prefix node
- is of type <literal>MOD</literal>.
- </para>
- </listitem>
- </itemizedlist>
- </para>
-
- <para>
- The modifier node is a "utility" node used for name-value pairs,
- such as prefixes, proximity arguements, etc.
- <itemizedlist>
- <listitem>
- <para>
- <literal>name</literal> name of mod node.
- </para>
- </listitem>
- <listitem>
- <para>
- <literal>value</literal> value of mod node.
- </para>
- </listitem>
- <listitem>
- <para>
- <literal>next</literal>: pointer to next node which is
- always a mod node (NULL for last entry).
- </para>
- </listitem>
</itemizedlist>
</para>
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