Enum Error 

pub enum Error {
    DepthExceeded,
    NodeBudgetExceeded,
    ContextBudgetExceeded,
    TermBudgetExceeded,
    CyclicContext(String),
    InvalidContext,
    InvalidTermDefinition(String),
    RestructuringKeyword(String),
    UnresolvedContext(String),
    Unsupported(String),
    CanonicalizationBudgetExceeded,
}

Why a document could not be processed.

Variants

DepthExceeded

Nesting past Limits::max_depth.

NodeBudgetExceeded

More objects than Limits::max_nodes.

ContextBudgetExceeded

More context entries than Limits::max_contexts.

TermBudgetExceeded

More terms in one context than Limits::max_terms.

CyclicContext(String)

A context, or a term definition, that refers back to itself.

InvalidContext

A @context value that is not an IRI, a term map, an array of those, or null.

InvalidTermDefinition(String)

A term definition JSON-LD does not allow.

RestructuringKeyword(String)

A document using @graph, @included or @reverse, or a term aliased to one of them.

These let a single RDF graph be written as several different trees. Because a Linked Data Signature covers the graph rather than the tree, a signed activity can be restructured — its object promoted to the top level under @graph, or properties hidden behind @included — so that every tree-reading implementation reads something the signer did not say, with the signature still verifying. That is GHSA-9rfg-v8g9-9367, disclosed across several fediverse projects in 2025 with the recommendation that implementations reject all three; ojak does.

UnresolvedContext(String)

A context the registry does not hold — one ojak does not ship, and the caller did not add — met where guessing is not good enough: turning a document into RDF (rdf), which a signature covers.

Unsupported(String)

Something JSON-LD allows that ojak does not turn into RDF.

CanonicalizationBudgetExceeded

Labelling the blank nodes of a dataset took more work than rdf::canonicalize allows one dataset.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Error

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Eq for Error

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for Error

fn eq(&self, other: &Error) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Error