Section 5: Metadata Requirements Section 5: Metadata Requirements This section defines metadata requirements for BIM objects. The scope of this section includes naming conventions for files, objects, properties, materials, values and images. 5.1 Naming conventions 5.1.1 The BIM object shall use spellings that respect the approach taken by the parent resource, e.g. NBS uses the Shorter Oxford English Dictionary (SOED) as the default spelling guide, COBie and IFC use North American English. 5.1.2 Names shall be composed of alphanumeric characters without text formatting (e.g. a-z, A-Z, 0-9 ) and single spaces. Names shall be limited to a maximum of 50 characters. Fields shall be separated by the underscore character (_). 5.1.3 The BIM object shall include properties and values that are consistently named. 5.1.4 Where the BIM platform has file name character limitations, the values within the fields can be abbreviated. An abbreviation can be created using no more than 7 characters, using upper-case lettering without full stops and spaces. The same abbreviation shall be used for its singular or plural contexts. 5.2 File and BIM object naming 5.2.1 The BIM object name and file name shall be unique. 5.2.2 Names shall be composed of only alphanumeric characters without text formatting (e.g. a-z, A-Z, 0-9 ). The naming fields shall use the underscore character (_) as a delimiter and the dash character (-) within phrases. Information within each field is to be CamelCase (capitalized first letters to words and no spaces). No spaces or other punctuation shall be used. 5.2.3 The file and BIM object name shall be composed of: ____ Field Type Description 1 Used to convey the library object author by a 3 â€“ 6 digit code. Role 2 Source Used to identify the library object manufacturer. The manufacturer name shall not be abbreviated. For a generic object this field may be omitted. 3 Used to identify the object type. Type 4 Subtype/ Product code Used to convey additional information to further define the construction product such as the product range. The manufacturer product range shall not be abbreviated. This field can also be used to identify the predefined (Sub)type. 5 (Optional) Differentiator Used to convey additional specialist information not captured in property data. 5.2.4 The BIM object file name shall include the default file extension for its respective BIM Platform or file format. 5.3 Naming of individual layers within a multi-layered object 5.3.1 A multi-layered BIM object shall include individual layers that are named to clause 5.2 5.4 Naming of materials within the BIM platform 5.4.1 The material name shall be unique. 5.4.2 The material name shall be composed of: ____ 30