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identifying

An identifier is a name that identifies (that is, labels the identity of) either a unique object or a unique class of objects, where the "object" or class may be an idea, physical countable object (or class thereof), or physical noncountable substance (or class thereof). The abbreviation ID often refers to identity, identification (the process of identifying), or an identifier (that is, an instance of identification). An identifier may be a word, number, letter, symbol, or any combination of those.
The words, numbers, letters, or symbols may follow an encoding system (wherein letters, digits, words, or symbols stand for [represent] ideas or longer names) or they may simply be arbitrary. When an identifier follows an encoding system, it is often referred to as a code or ID code. For instance the ISO/IEC 11179 metadata registry standard defines a code as system of valid symbols that substitute for longer values in contrast to identifiers without symbolic meaning. Identifiers that do not follow any encoding scheme are often said to be arbitrary IDs; they are arbitrarily assigned and have no greater meaning. (Sometimes identifiers are called "codes" even when they are actually arbitrary, whether because the speaker believes that they have deeper meaning or simply because they are speaking casually and imprecisely.)
The unique identifier (UID) is an identifier that refers to only one instance—only one particular object in the universe. A part number is an identifier, but it is not a unique identifier—for that, a serial number is needed, to identify each instance of the part design. Thus the identifier "Model T" identifies the class (model) of automobiles that Ford's Model T comprises; whereas the unique identifier "Model T Serial Number 159,862" identifies one specific member of that class—that is, one particular Model T car, owned by one specific person.
The concepts of name and identifier are denotatively equal, and the terms are thus denotatively synonymous; but they are not always connotatively synonymous, because code names and ID numbers are often connotatively distinguished from names in the sense of traditional natural language naming. For example, both "Jamie Zawinski" and "Netscape employee number 20" are identifiers for the same specific human being; but normal English-language connotation may consider "Jamie Zawinski" a "name" and not an "identifier", whereas it considers "Netscape employee number 20" an "identifier" but not a "name." This is an emic indistinction rather than an etic one.

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  1. S

    Help identifying a Bristan Shower

    Hi All As you can see from the attached pix, the flow control knob on my Bristan shower has broken. It was installed before I bought the house (possibly between 2015 and 2017) but I've no idea what model it is. Firstly, can anyone help me to identify it to see if I can get a replacement knob...
  2. S

    Identifying 3/4" copper from 22mm copper.

    I'm a kitchen fitter first and foremost, so occasionally encounter old pipes of varying sizes. From past experience I know how easy it is to misidentify old 3/4" copper pipe (apart from getting soaked when you get it wrong) and would like to know if there is a surefire way of telling it from...
  3. T

    Identifying waste pipe type

    How can you tell if a white 30 or 40mm waste pipe is pvc or abs?
  4. D

    Need help identifying shower control and cartridge?

    Single handle no markings any where. The seat rides on a cylinder and is concaved or valley shaped instead of flat. Been too every pro plumbing supply store and box store in town no help.
  5. S

    Help identifying type of pipe system

    Can anyone identify this adapter? It's 22mm copper to an unknown plastic piping system (non-standard size, I think it's 25mm or similar). It's on an older UFH system. Failing that, any alternative suggestions are welcome. I need to replace the mixing valve and the manifold, so due to the new...
  6. S

    Help identifying type of pipe connection.

    Hi, Could someone help me with that this is please? I noticed we have several of these types of connections in the bathroom and also on the loft. One in particular in the loft I will need to alter pipe work as it’s in the way for making a bigger loft hatch. Many thanks.
  7. K

    help identifying bath mixer taps

    Hi all, I'm having a lot of trouble trying to find replacement cartridges for this set of mixer taps. They were purchased approx 10 years ago. I have been told they are from ultra finishing, but they having looked at the pics state it's not one of theirs. Any help identifying them would be...
  8. gb17342

    Help identifying pipes

    Can anyone help me identify these pipes please? They are connected to a water tank in the roof of a tenement in Glasgow. I'm trying to work out which pipe is filling the tank from the mains supply, because pipe 2 also supplies all the water in my flat so I'm hoping it's not coming from the tank...
  9. M

    Identifying a Themostat

    Good morning. I hope you are all doing well. I have a query regarding my thermostat. Long story short, I have no idea how to program the overly complex thing without a manual which the previous owners of our house didn't leave. It is a 'Smart' portable thermostat. Smart is the brand, not...
  10. skpl256

    Hudson Reed shower - need help with identifying the solution to the water dripping problem

    I had this exposed valve thermostatic shower system installed about 2 years ago. It has 2 shower heads - a round overhead mount and handheld attachment. There are 4 valves in total: one to select a shower head, one to control the water flow to the shower heads, one to control the water...
  11. M

    Need help identifying radiator valve

    Is anyone able to identify this radiator valve please? I would like to source a replacement valve cap/knob (whatever the correct term is) Thanks in advance.
  12. O

    Need help identifying parts/where to purchase.

    Hi everyone, i was wondering if anyone could help me with the name (if they have one) of the following arrowed parts and where i can purchase them from? Your help would be much appreciated. Thanks in advance.
  13. D

    Help identifying shower mixer for spare parts

    I need help to identify the brand of this unit for spare parts. The plastic thread for the lever has worn out, also the shower isn't very hot now even with hot valve opened all the way.
  14. mp4rma

    Help identifying connector

    Hi, One of the connectors I have for my water filter has snapped, well the screwbit has. I've been trying to contact the supplier but I'm assuming they're closed until the new year. If I can find out the name of this connector I'll just go to Screwfix and pick it up. I've attached the photos...
  15. F

    Help identifying what these pipes are for

    Hello all, I was clearing out my first floor bedroom built-in cabinet and saw these pipework in the image. I'm not 100% sure what they are for. The only thing I can think of it for the central heating system as the pipes seem to go quite high (quite a but higher than radiators in my house)...
  16. S

    Identifying limescale in a hot water cylinder?

    Hi there, I have a 20 year old hot water cylinder, which is heated from an oil boiler (aga), and has an electric immersion element as well. I don't get much hot water out of the system before it turns cold, and I've been told it might be limescaled up and need replacing. I installed 4...
  17. S

    Help with identifying stopcock under sink

    Hi everyone I’m trying to locate my stopcock. I’ve searched the house inside and outside and I think it must be one of these two brass taps under the sink. Photo Attached ( the bottom one is almost hidden by a pipe). The bottom one does not budge at all (although I haven’t tried some WD40 on it...
  18. S

    Help identifying shower make (Sanitrex?) and where to get spare part needed?

    Please see attached photos. Can anybody help with identifying the make of the shower unit and where to source the spare part in the photo? Top shower control knob has stopped working. On pulling the shower out and getting further advice the concealed control unit will need replacing. Appreciate...
  19. TeeCee

    Help Identifying Shower Seals

    Hi, I'm trying to replace an old shower door seal fitted by the previous owners of our house but I'm having some difficulties finding an exact match. The glass shower screen is cut at an angle where it meets the door to provide a neat fit and the seal is specially shaped to fit nicely over the...
  20. mrb1972

    Help, identifying shower drain (pic attached)

    Hi, Just trying to clear hair etc from our shower drain, does anyone know if the center piece (with water in it) shown in photo should just pull up or would I need to unscrew the whole thing. Sorry if question if obvious, i'm new to all this.. Thanks
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