Sei es Vormerkung oder Fernleihe: Die Bereitstellung wird bestätigt.

It is an idiomatic structure meaning something like:

• Be it a reservation or an interlibrary loan
• Whether it is a hold request or an interlibrary loan

In other words, the sentence is saying that the following statement applies in either case.

So the pattern Sei es X oder Y is used to mean regardless of whether it is X or Y.

Sei is the Konjunktiv I form of sein.

Here, it is not being used for reported speech, but in a fixed, somewhat formal expression: Sei es ... oder ...

This structure is idiomatic and means be it ... or ... / whether it be ... or ....

So:

• Ist es Vormerkung oder Fernleihe would sound like a direct question: Is it a reservation or an interlibrary loan?
• Sei es Vormerkung oder Fernleihe is not a question. It introduces alternatives in a formal, set phrase.

It is understandable and perfectly correct, but it sounds a bit formal, written, or administrative.

You are more likely to see it in:

• official notices
• library systems
• instructions
• formal writing

In everyday speech, people might use simpler alternatives such as:

• Ob es eine Vormerkung oder eine Fernleihe ist, ...
• Egal ob Vormerkung oder Fernleihe, ...

So the original sentence has a formal, bureaucratic tone.

German often leaves out articles in short, formal category labels or in fixed expressions like this.

So Vormerkung and Fernleihe are being treated as types or categories:

• Vormerkung
• Fernleihe

rather than as fully expanded noun phrases like:

• eine Vormerkung
• eine Fernleihe

You could also say:

• Sei es eine Vormerkung oder eine Fernleihe ...

That would be more explicit, but the article-less version is very natural in administrative or system language.

In a library context, Vormerkung usually means a hold request or reservation, especially for an item that is currently unavailable.

It is not always the same as a general Reservierung in every context.

Typical nuance:

• Vormerkung = putting your name down for an item, often when it is currently checked out
• Reservierung = a broader word for reservation in many contexts

In library German, Vormerkung is very common and specific.

Fernleihe means interlibrary loan.

It refers to a system where a library gets a book or other item for you from another library.

So in the sentence, the two possibilities are:

• a local hold/request (Vormerkung)
• an interlibrary loan (Fernleihe)

Bereitstellung literally means making available or provision.

In a library notice, it usually means that the item has been made available for the user, often for pickup.

So Die Bereitstellung wird bestätigt means that the system is confirming the availability/provision of the requested item.

Depending on the exact library workflow, it could imply something like:

• the item is ready
• the availability has been officially recorded
• the provision of the item is confirmed

Yes. wird bestätigt is the present passive.

It is formed with:

• werden
  • past participle

Here:

• wird = present tense of werden
• bestätigt = past participle of bestätigen

So:

• Die Bereitstellung wird bestätigt = The provision/availability is confirmed

This is a very common style in formal German, especially in notices, systems, and administrative language.

Yes, a little bit, depending on context.

Grammatically, it is present passive: is being confirmed / is confirmed.

But in formal notices, German present tense can sometimes sound slightly broader in time, especially in system language. So it may function like:

• is hereby confirmed
• will be confirmed
• has been confirmed

The exact English translation depends on the situation and on how the library system phrases its notices. But grammatically, the form itself is present passive.

The colon introduces the main statement that follows.

The first part sets up the alternatives:

• Sei es Vormerkung oder Fernleihe

Then the colon introduces the conclusion or applicable statement:

• Die Bereitstellung wird bestätigt.

This punctuation is very common in formal written German when the first part functions like a heading or framing phrase.

You could think of it as:

• Whether it is a hold request or an interlibrary loan: the availability is confirmed.

They are effectively in the nominative.

That is because they are linked to sein in the expression Sei es .... With sein, predicate nouns are normally nominative.

If articles were included, you would see this clearly:

• Sei es eine Vormerkung oder eine Fernleihe

Both nouns would still be nominative.

Yes. A more transparent version could be:

• Ob es sich um eine Vormerkung oder eine Fernleihe handelt, die Bereitstellung wird bestätigt.
• Egal ob Vormerkung oder Fernleihe, die Bereitstellung wird bestätigt.

These versions are less compact and, in the second case, a bit less formal.

The original sentence is concise and stylistically suited to official or system-generated text.