A comparison of terminology used in MasterFormat (including before it was called MasterFormat) reveals an inconsistent history in the type of terminology used. Some of that obviously relates to changes in the technology over the years as well as increased sophistication. But it also reveals inconsistent terminology within editions and oscillation between an emphasis on work results versus products. The following is an non-scientific comparison of a few listings in the format since its inception. In each of the following listings, the similar terms are listed in their order of appearance in the 1964, 1972, 1978, 1983, 1988, 1995, and 2004 editions of the format (---- signifies not listed):
Glass, Glazing, Glazing, Glazing, Glazing, Glazing, Glazing.
----, ----, Glass, Glass, Glass, Glass, Glass Glazing.
----, ----, Glazing Plastics, Plastic Glazing, Plastic Glazing, Plastic Glazing, Plastic Glazing.
Mirrors, ----, Mirror Glass, Mirror Glass, Mirrored Glass, Mirrors, Mirrors.
----, Structural Metal Framing, Structural Metal Framing, Structural Metal Framing, Structural Metal Framing, Structural Metal Framing, Structural Metal Framing.
Structural Steel, ----, Structural Steel, Structural Steel, Structural Steel, Structural Steel, Structural Steel Framing.
Decking, Metal Decking, Metal Decking, Metal Decking, Metal Decking, Metal Deck, Metal Decking.
----, Metal Roof Decking, Metal Roof Deck, Steel Roof Deck, Steel Roof Deck, Steel Roof Deck, Steel Roof Decking.
----, Metal Floor Decking, Metal Floor Deck, Steel Floor Deck, Steel Floor Deck, Steel Floor Deck, Steel Floor Decking.
----, Unit Masonry, Unit Masonry, Unit Masonry, Unit Masonry, Masonry Units, Unit Masonry.
Brick, Brick Masonry, Brick Masonry, Brick Masonry, Clay Unit Masonry, Clay Masonry Units, Clay Unit Masonry.
Concrete Masonry Units, Concrete Unit Masonry, Concrete Unit Masonry, Concrete Unit Masonry, Concrete Unit Masonry, Concrete Masonry Units, Concrete Unit Masonry.
----, ----, Reinforced Unit Masonry, Reinforced Unit Masonry, Reinforced Unit Masonry (Non-Reinforced Masonry Systems), Masonry Assemblies, Multi-Wythe Unit Masonry.
----, Refractories, Refractories, Refractories, Refractories, Refractories, Refractories.
----, ----, Corrosion Resistant Masonry, Corrosion Resistant Masonry, Corrosion Resistant Masonry, Corrosion-Resistant Masonry, Corrosion-Resistant Masonry.
(This information reads much better in a tabular form, but that doesnt translate into this discussion forum. If you would like a MS Word file with it in a tablular form send me an email at rwj@jandjconsultants.com.)
The terminology chosen for the 2004 edition was selected on the basis of the guiding principles determined by the expansion task team. One of those principles was that the format was primarily for the purpose of organizing project manuals on the basis of work results. Sheldon does a good job of explaining that concept in the posting above. The task team thought this was very close to the original stated primary purpose for the format in the early 1960s of arranging specifications by units of work and was also compatible with the OmniClass system of tables of organizing all information for the built environment. When there was an appropriate choice about the type of terminology, a term reflecting the concept of work results was selected versus a product type term. For work that centers on a manufactured product, the work result type term is the often the same as the product type term.
We are all creatures of habit. When something that has been static in our world for some time changes, it always creates a hassle. So it is when some words we have been used to seeing for years change, it takes some time to assimilate the change. The question is was it a change for the good?
I think you can see from the above comparisons that the 2004 edition has tried to achieve a better level of consistent terminology than in previous editions. All of the previous editions included a mixture of types of terminology often using a product type term within the same major listing where a work result type term is used (Metal Decking, Steel Roof Deck, Steel Floor Deck). I am sure that there is still room for improvement for improving the consistency in this area, but I believe the 2004 edition has made significant improvements in achieving a more consistent terminology by following the above principles.
I am an Accredited MasterFormat Instructor, but you can still obviously take anything I say with a grain of salt (that is if you still eat salt).