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Preface

Virtuoso Functions Guide

Administration
Aggregate Functions
Array Manipulation
BPEL APIs
Backup
Compression
Cursor
Date & Time Manipulation
Debug
Dictionary Manipulation
Encoding & Decoding
File Manipulation
Free Text
Hashing / Cryptographic
LDAP
Locale
Mail
Miscellaneous
Number
Phrases
RDF data
Remote SQL Data Source
Replication
SOAP
SQL
String
Transaction
Type Mapping
UDDI
User Defined Types & The CLR
VAD
Virtuoso Java PL API
Virtuoso Server Extension Interface (VSEI)
Web & Internet
XML
XPATH & XQUERY
and
append
assign
avg
boolean
ceiling
concat
contains
count
create-attribute
create-comment
create-element
create-pi
current
distinct
doc
document
document-literal
empty
ends-with
every
except
false
filter
floor
fn:collection
for
format-number
function-available
generate-id
id
if
intersect
is_after()
is_before()
key
lang
last
let
list()
local-name
max
min
name
namespace-uri
normalize-space
not
number
or
position
processxquery
processxslt
processxsql
progn()
replace()
round
serialize
shallow
some
starts-with
string
string-length
substring
substring-after
substring-before
sum
system-property
text_contains()
translate
true
tuple()
union
unordered
unparsed-entity-uri
urlify
xmlview

Functions Index

position

Returns the context position from expression evaluation context.
number position
Description

Context position is the number of nodes in the node-set where the context node comes from. For the most popular case, when position() is used inside a predicate, and the predicate relates to some axis of the path, position() is the number of calls of the predicate, including the "current" call which is in progress when the function is called. Thus, context position cannot be greater than context size.

Return Types

Positive integer.

Examples
Explicit call of position() inside a predicate

For every waybill, find the last <address> child inside the <waybill> element.

//waybill/address[position() = last()]
Implicit call of position() inside a predicate

For every article, find up to three first paragraphs of the first section.

//article/section[1]/paragraph[position()<=3]
See Also

last() count()