Functions, operators, and data types for XPath 4.0

A second $position argument is available on many function callbacks, for example those on every, filter, for-each, index-where, some.

Comments (between '#' characters) are allowed in regular expressions if the 'c' flag is set. A '#' character can be escaped as \# or [#]. (PR 1022)

The following functions are new in 4.0 (some of these were already implemented in Saxon 12):

• array:build
• array:empty
• array:foot
• array:index-of
• array:index-where
• array:items
• array:members
• array:of-members
• array:slice
• array:sort-by
• array:sort-with
• array:split
• array:trunk
• fn:atomic-type-annotation
• fn:build-dateTime
• fn:build-uri
• fn:char
• fn:characters
• fn:civil-timezone
• fn:collation-available
• fn:collation
• fn:contains-subsequence
• fn:csv-doc
• fn:csv-to-arrays
• fn:csv-to-xml
• fn:decode-from-uri
• fn:distinct-ordered-nodes
• fn:do-until
• fn:duplicate-values
• fn:element-to-map
• fn:element-to-map-plan
• fn:ends-with-subsequence
• fn:every
• fn:expanded-QName
• fn:foot
• fn:function-identity
• fn:graphemes
• fn:hash
• fn:highest
• fn:html-doc
• fn:identity
• fn:in-scope-namespaces
• fn:index-where
• fn:insert-separator
• fn:invisible-xml
• fn:is-NaN
• fn:items-at
• fn:jkey
• fn:jposition
• fn:jtree
• fn:jvalue
• fn:lowest
• fn:message
• fn:node-type-annotation
• fn:op
• fn:parse-QName
• fn:parse-csv
• fn:parse-html
• fn:parse-integer
• fn:parse-uri
• fn:parts-of-dateTime
• fn:partial-apply
• fn:partition
• fn:replicate
• fn:scan-left
• fn:scan-right
• fn:schema-type
• fn:seconds
• fn:siblings
• fn:slice
• fn:some
• fn:sort-with
• fn:starts-with-subsequence
• fn:subsequence-where
• fn:take-while
• fn:transitive-closure
• fn:trunk
• fn:type-of
• fn:unix-dateTime
• fn:unparsed-binary
• fn:void
• fn:while-do
• fn:xsd-validator
• map:build
• map:empty
• map:entries
• map:filter
• map:items
• math:cosh
• math:e
• math:sinh
• math:tanh

The following functions have been significantly extended in 4.0. Again, a few of the changes might have already been implemented in Saxon 12:

• array:filter
• array:for-each-pair
• array:for-each
• array:get
• array:index-where
• array:join
• array:sort-by
• array:subarray
• fn:all-different
• fn:all-equal
• fn:analyze-string
• fn:apply
• fn:atomic-equal
• fn:avg
• fn:base-uri
• fn:codepoints-to-string
• fn:compare
• fn:concat
• fn:day-from-dateTime
• fn:deep-equal
• fn:distinct-values
• fn:divide-decimals
• fn:do-until
• fn:doc-available
• fn:doc
• fn:document-uri
• fn:element-to-map
• fn:error
• fn:every
• fn:filter
• fn:for-each-pair
• fn:for-each
• fn:format-date
• fn:format-dateTime
• fn:format-integer
• fn:format-number
• fn:format-time
• fn:function-annotations
• fn:has-children
• fn:hours-from-dateTime
• fn:in-scope-prefixes
• fn:index-of
• fn:index-where
• fn:innermost
• fn:invisible-xml
• fn:json-doc
• fn:jtree
• fn:label
• fn:load-xquery-module
• fn:max
• fn:min
• fn:minutes-from-dateTime
• fn:month-from-dateTime
• fn:namespace-uri-for-prefix
• fn:normalize-space
• fn:outermost
• fn:parse-json
• fn:parse-xml-fragment
• fn:parse-xml
• fn:path
• fn:random-number-generator
• fn:remove
• fn:replace
• fn:resolve-uri
• fn:round-half-to-even
• fn:round
• fn:serialize
• fn:some
• fn:sort-by
• fn:string-length
• fn:subsequence
• fn:substring
• fn:sum
• fn:take-while
• fn:timezone-from-dateTime
• fn:tokenize
• fn:trace
• fn:unparsed-text-available
• fn:unparsed-text-lines
• fn:unparsed-text
• fn:while-do
• fn:xml-to-json
• fn:year-from-dateTime
• map:filter
• map:find
• map:for-each
• map:get
• map:items
• map:merge
• map:put
• map:remove

4.0 Functions not yet (fully) implemented

Here is a list of some of the features in the 4.0 specifications that have NOT yet been implemented. Please check the QT4 GitHub project (https://github.com/qt4cg/qtspecs) for the latest status: Pull Requests are labeled "In Saxon13" when they have been implemented.

• PR 957 - scan-left and scan-right functions

• PR 2552 - system-properties function

• PR 791 - The fn:invisible-xml function is not implemented in SaxonCS

• PR 1068 - The SaxonCS implementation of fn:graphemes does not handle all strings correctly. This is due to limitations in the ICU4N library.