Nodes

LilvNode *lilv_new_uri(LilvWorld *world, const char *uri)

Create a new URI value.

Returned value must be freed by caller with lilv_node_free().

LilvNode *lilv_new_file_uri(LilvWorld *world, const char *host, const char *path)

Create a new file URI value.

Relative paths are resolved against the current working directory. Note that this may yield unexpected results if host is another machine.

Parameters

• world – The world.

• host – Host name, or NULL.

• path – Path on host.

Returns

A new node that must be freed by caller.

LilvNode *lilv_new_string(LilvWorld *world, const char *str)

Create a new string value (with no language).

Returned value must be freed by caller with lilv_node_free().

LilvNode *lilv_new_int(LilvWorld *world, int val)

Create a new integer value.

Returned value must be freed by caller with lilv_node_free().

LilvNode *lilv_new_float(LilvWorld *world, float val)

Create a new floating point value.

Returned value must be freed by caller with lilv_node_free().

LilvNode *lilv_new_bool(LilvWorld *world, bool val)

Create a new boolean value.

Returned value must be freed by caller with lilv_node_free().

void lilv_node_free(LilvNode *val)

Free a LilvNode.

It is safe to call this function on NULL.

LilvNode *lilv_node_duplicate(const LilvNode *val)

Duplicate a LilvNode.

bool lilv_node_equals(const LilvNode *value, const LilvNode *other)

Return whether two values are equivalent.

char *lilv_node_get_turtle_token(const LilvNode *value)

Return this value as a Turtle/SPARQL token.

Returned value must be freed by caller with lilv_free().

Example tokens:

• URI: <http://example.org/foo&gt;

• QName: doap:name

• String: “this is a string”

• Float: 1.0

• Integer: 1

• Boolean: true

bool lilv_node_is_uri(const LilvNode *value)

Return whether the value is a URI (resource).

const char *lilv_node_as_uri(const LilvNode *value)

Return this value as a URI string, like “http://example.org/foo”.

Valid to call only if lilv_node_is_uri(value) returns true. Returned value is owned by value and must not be freed by caller.

bool lilv_node_is_blank(const LilvNode *value)

Return whether the value is a blank node (resource with no URI).

const char *lilv_node_as_blank(const LilvNode *value)

Return this value as a blank node identifier, like “genid03”.

Valid to call only if lilv_node_is_blank(value) returns true. Returned value is owned by value and must not be freed by caller.

bool lilv_node_is_literal(const LilvNode *value)

Return whether this value is a literal (that is, not a URI).

Returns true if value is a string or numeric value.

bool lilv_node_is_string(const LilvNode *value)

Return whether this value is a string literal.

Returns true if value is a string value (and not numeric).

const char *lilv_node_as_string(const LilvNode *value)

Return value as a string.

char *lilv_node_get_path(const LilvNode *value, char **hostname)

Return the path of a file URI node.

Returns NULL if value is not a file URI. Returned value must be freed by caller with lilv_free().

bool lilv_node_is_float(const LilvNode *value)

Return whether this value is a decimal literal.

float lilv_node_as_float(const LilvNode *value)

Return value as a float.

Valid to call only if lilv_node_is_float(value) or lilv_node_is_int(value) returns true.

bool lilv_node_is_int(const LilvNode *value)

Return whether this value is an integer literal.

int lilv_node_as_int(const LilvNode *value)

Return value as an integer.

Valid to call only if lilv_node_is_int(value) returns true.

bool lilv_node_is_bool(const LilvNode *value)

Return whether this value is a boolean.

bool lilv_node_as_bool(const LilvNode *value)

Return value as a bool.

Valid to call only if lilv_node_is_bool(value) returns true.