List the dictionaries (classification systems, e.g. IFC, ETIM, Uniclass) published in bSDD. Start here to discover the dictionary URIs the other tools need.

List the classes of one dictionary, optionally filtered by text, class type or related IFC entity. Use this to browse a dictionary; use bsdd_search_classes to search across dictionaries.

List the properties defined by one dictionary, optionally filtered by text.

Free-text search for classes across all bSDD dictionaries, including IFC. This is the best starting point for questions like "which class describes a wall?".

Free-text search returning both classes and properties. Pagination is shared: classes are listed first, properties after them. Note that the IFC dictionary is only included when includePreview is true (the default here); use bsdd_search_classes for class-only searches.

Get the details of one class: definition, class type, related IFC entities and (optionally) child classes and relations. Properties are fetched separately with bsdd_get_class_properties.

List the properties assigned to a class, with their data type, units, allowed values and property set. Use this instead of the deprecated IncludeClassProperties option of bsdd_get_class.

List the relations of a class (e.g. IsEqualTo, HasMaterial, IsParentOf) or, with reverse=true, the classes that point at it. Useful for mapping between dictionaries.

Get the details of one property: data type, units, allowed values, description and related properties.

List the classes that use a given property.

Get the details of a single property value (an item of an enumeration), by its URI.

List one of the bSDD reference lists: countries, languages, units (with QUDT URIs) or reference documents. These are the allowed values for the corresponding fields on classes and properties.