Module sequence_ops 

Sequence operations for XPath evaluation.

This module implements XPath 2.0 sequence operations:

• Union (|) - node-only, returns nodes in document order
• Intersect - node-only, returns nodes in document order
• Except - node-only, returns nodes in document order

Note: Union, intersect, and except are NODE-ONLY operations in XPath 2.0. Applying them to atomic values results in XPTY0004.

Functions

contains_value

Check if a sequence contains a specific value (by value equality).

count

Get the count of items in a sequence.

deep_equal

Deep equality check between two atomic value sequences.

distinct_values

Get distinct values from a sequence (removes duplicates by value equality).

except_atomic_values

Compute the difference of two atomic value sequences.

except_nodes

Compute the difference of two node sequences (left except right).

except_valuesDeprecated

Deprecated: Use except_atomic_values for atomic sequences or except_nodes for nodes.

head

Get the first item from a sequence, if any.

index_of

Find the index of a value in a sequence (1-based, XPath style).

insert_before

Insert an item at a specific position.

intersect_atomic_values

Compute the intersection of two atomic value sequences.

intersect_nodes

Compute the intersection of two node sequences.

intersect_valuesDeprecated

Deprecated: Use intersect_atomic_values for atomic sequences or intersect_nodes for nodes.

is_empty

Check if a sequence is empty.

is_singleton

Check if a sequence contains exactly one item.

remove_at

Remove an item at a specific position.

reverse

Reverse a sequence.

subsequence

Subsequence (slice) of a sequence.

tail

Get all items except the first from a sequence.

union_atomic_values

Compute the union of two atomic value sequences (deduplicates by value equality).

union_nodes

Compute the union of two node sequences.

union_valuesDeprecated

Deprecated: Use union_atomic_values for atomic sequences or union_nodes for nodes.