Struct KnowledgeGraph 

pub struct KnowledgeGraph { /* private fields */ }

Implementations

impl KnowledgeGraph

pub fn new(db: PalaceDb) -> Self

pub async fn add_entity( &self, name: &str, entity_type: &str, properties: Option<Value>, ) -> Result<String, DbError>

Add or update an entity node.

pub async fn add_triple( &self, subject: &str, predicate: &str, object: &str, valid_from: Option<&str>, valid_to: Option<&str>, ) -> Result<String, DbError>

Add a triple (subject → predicate → object).

Auto-creates entity nodes if they don’t exist. Returns the triple ID, or the existing ID if an identical active triple exists.

pub async fn invalidate( &self, subject: &str, predicate: &str, object: &str, ended: Option<&str>, ) -> Result<u64, DbError>

Mark a triple as no longer valid.

pub async fn query_entity( &self, name: &str, as_of: Option<&str>, direction: &str, ) -> Result<Vec<Triple>, DbError>

Get all relationships for an entity.

• direction — "outgoing" (entity→?), "incoming" (?→entity), "both"
• as_of — only facts valid at this date (YYYY-MM-DD)

pub async fn timeline( &self, entity: Option<&str>, ) -> Result<Vec<Triple>, DbError>

Chronological timeline of facts (optionally filtered by entity).

pub async fn stats(&self) -> Result<Value, DbError>

Knowledge graph statistics.

Trait Implementations

impl Clone for KnowledgeGraph

fn clone(&self) -> KnowledgeGraph

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for KnowledgeGraph

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.