Interface XPathContext

The current context node being evaluated.

The position of the context node within the current node set (1-based). Used by position() function and numeric predicates.

The size of the current node set. Used by last() function.

The full node list for the current context. Used by the 'self-and-siblings' axis (XSLT-specific).

Variable bindings available during evaluation. Variables are referenced in XPath as $variableName.

Custom functions available during evaluation. These extend the built-in XPath 1.0 function library.

Namespace bindings for resolving prefixes in XPath expressions. Maps namespace prefixes to namespace URIs. Example: { "atom": "http://www.w3.org/2005/Atom" }

XSLT version ('1.0', '2.0', '3.0') for version-specific behavior. Used by functions like json-to-xml() which are only available in XSLT 3.0+

XPath specification version being used. Default: '1.0'

This affects:

• Function library available
• Type system behavior
• Sequence vs node-set handling

Enable XPath 1.0 backward compatibility mode (Phase 8.1). When true, XPath 2.0+ expressions follow XPath 1.0 type conversion rules. This enables:

• XPath 1.0 boolean conversion semantics
• XPath 1.0 numeric conversion (with NaN for empty sequences)
• XPath 1.0 comparison rules (node-set to string conversion)
• XPath 1.0 logical operator behavior (short-circuit, error suppression) Default: false (XPath 2.0 semantics)

Default collation for string comparisons (XPath 2.0+). Default: Unicode codepoint collation

Base URI for resolving relative URIs (XPath 2.0+).

Implicit timezone as duration offset from UTC (XPath 2.0+). Example: '-PT5H' for US Eastern Time (UTC-5)

Extension data for XSLT or custom implementations. This allows attaching arbitrary data to the context without polluting the main interface.

Current dateTime in the dynamic context (XPath 2.0+). Returned by fn:current-dateTime(). If not provided, defaults to system time when accessed.

Available documents mapping for fn:doc() function (XPath 2.0+). Maps document URIs to their root document nodes. Example: { "http://example.com/data.xml": rootNode }

Available collections mapping for fn:collection() function (XPath 2.0+). Maps collection URIs to sequences of nodes. Example: { "http://example.com/collection": [node1, node2, ...] }

Default collection URI when fn:collection() is called without arguments (XPath 2.0+). If provided, fn:collection() returns availableCollections[defaultCollection].

Function implementations registry (XPath 2.0+). Maps QName function names to their implementations. Allows defining custom/XSLT functions at evaluation time. Format: "localName" or "prefix:localName"