EuDML

OpenSearch allows to query EuDML index  in a machine way.

The query has a form:

http://eudml.org/api/search?q={searchQuery}&startIndex={startIndex?}&count={count?}&format={format}

where:

• searchQuery - the search query in CQL (details below)
• startIndex - the index of the first search result (offset) (optional)
• count - number of search results (optional)
• format - one of rss, xml, html (required)

The exact form of response can be seen by using the service.

SearchQuery is accepted in CQL (http://www.loc.gov/standards/sru/specs/cql.html) language. Most of this language syntax is supported.

General format of the searchQuery is "fieldName operator term(s)", where:

fieldName can be one of:

• all - search within all data
• defName - search within titles
• defDescription - search within abstracts
• authorCoauthorName - search within authors' names
• language - search within languages (ISO 639-1 code)
• journalName - search within journal names
• published - search within dates of publication
• id - search by identifiers

operator can be one of:

STANDARD OPERATORS

"=" ("==") - phrase query

EXAMPLE: defName = "Riemann–Stieltjes integral"

"=/exact" - phrase query matching only whole values

EXAMPLE: defName =/exact "the proof book 1"

"any" - search for any of given terms (like boolean OR)

EXAMPLE: defDescription any "integral ring"

"all" - search for all of given terms (like boolean AND)

EXAMPLE: defDescription all "integral ring"

"within" - search for terms within given bounds (inclusive)

EXAMPLE: published within "2001 2004"

"=/id" - special id query

EXAMPLE: id =/id "urn:eudml:doc:10345"

NUMERIC OPERATORS

">" (">=") - greater then (greater or equals)

EXAMPLE: published >= 2002

"<" ("<=") - less than (less or equals)

EXAMPLE: published < 2002

"<>" - less or greater

EXAMPLE: published <> 2002

Search clauses can be combined into boolean queries using "and", "or", "not" connectives.

EXAMPLE: (defName = integral or defName all "physics nuclear") and published > 2002 not defDescription any "weak short"

Search results can be ordered.

SORTING OPERATOR

"sortBy" - accepts multiple sort fieldNames, placed at the end of the query

EXAMPLE: defName=mathematics sortBy published defName

SORTING MODIFIERS

"sort.descending" - descending order, "sort.ascending" - ascending order

EXAMPLE: defName=mathematics sortBy published/sort.ascending defName/sort.descending