Di kantor, dokumen penting dipisahkan dari dokumen biasa.

Di kantor means in/at the office. It is a location phrase, and Indonesian often puts this kind of information at the beginning to set the scene.

So:

• Di kantor, dokumen penting dipisahkan dari dokumen biasa. = At the office, important documents are separated from ordinary documents.

You could also say:

• Dokumen penting dipisahkan dari dokumen biasa di kantor.

That is also grammatical, but starting with Di kantor gives the location more prominence.

It can mean either in the office or at the office, depending on context. Indonesian di is a general location preposition.

• di = in / at / on depending on the situation
• kantor = office

So di kantor is simply at the office or in the office.

The comma separates the opening location phrase from the main clause.

• Di kantor, = opening setting/location
• dokumen penting dipisahkan dari dokumen biasa = main statement

In Indonesian, this comma is common and natural when a phrase like Di kantor comes first, especially in careful or formal writing. In very casual writing, people may leave it out, but the comma helps readability.

No. This is a very important distinction.

1. di kantor

   • di is a preposition
   • it means in / at
   • it is written separately

2. dipisahkan

   • di- is a passive verb prefix
   • it marks the verb as passive
   • it is written attached to the verb

So:

• di kantor = location phrase
• dipisahkan = passive verb

This spelling difference matters a lot in Indonesian.

In Indonesian, adjectives usually come after the noun.

So:

• dokumen penting = important document(s)
• dokumen biasa = ordinary/regular document(s)

This is normal Indonesian word order:

• noun + adjective

Other examples:

• rumah besar = big house
• buku baru = new book

Dipisahkan comes from the root pisah, which has the basic idea of separate.

Here is the breakdown:

• pisah = separate
• memisahkan = to separate something
• dipisahkan = to be separated / to be set apart

The di- prefix marks the verb as passive, and -kan helps make it a transitive form meaning something like cause to be separate or separate something.

So dipisahkan here means are separated.

Yes, it is a passive sentence.

• dokumen penting is the thing receiving the action
• dipisahkan shows that the action is done to it

So the structure is roughly:

• Important documents are separated from ordinary documents.

An active version would be something like:

• Di kantor, petugas memisahkan dokumen penting dari dokumen biasa.
• At the office, staff separate important documents from ordinary documents.

In the original sentence, the person doing the separating is not mentioned.

Because Indonesian very often uses the passive when the agent is:

• unknown
• unimportant
• obvious from context
• not the focus of the sentence

Here, the important idea is the procedure or rule: important documents are separated from ordinary documents. The sentence focuses on what happens to the documents, not on who does it.

Because dari means from, and the verb here naturally goes with from in English too:

• dipisahkan dari = separated from

So:

• dokumen penting dipisahkan dari dokumen biasa = important documents are separated from ordinary documents

Do not confuse this with:

• oleh = by, used for the agent in a passive sentence
• dengan = with, using/with

For example:

• Dokumen itu dipisahkan oleh petugas. = The document was separated by the staff member.

But in your sentence, dari shows what the important documents are being separated from.

Here biasa means ordinary, regular, or normal.

So:

• dokumen biasa = ordinary documents / regular documents

It contrasts with dokumen penting = important documents.

Depending on context, biasa can also mean things like usual or accustomed, but in this sentence it clearly means ordinary/non-special.

Indonesian does not usually use articles like English a, an, or the.

So:

• dokumen penting can mean important document, important documents, the important document, or the important documents

The exact meaning depends on context.

In this sentence, the meaning is probably general or plural:

• important documents are separated from ordinary documents

By context. Indonesian nouns often do not change form for plural.

So dokumen can mean:

• document
• documents

If Indonesian wants to make plurality very explicit, it can use reduplication:

• dokumen-dokumen = documents

But very often that is unnecessary. In your sentence, English naturally interprets it as plural or generic:

• important documents are separated from ordinary documents

Yes. Indonesian sentences like this often sound general, habitual, or procedural, especially without a time marker.

So the sentence can mean something like:

• At the office, important documents are separated from ordinary documents.
• In the office, important documents get separated from regular documents.
• At the office, important documents are kept separate from ordinary documents.

The exact nuance depends on the larger context, but it often sounds like a general practice or rule.

No, that would not mean the same thing.

You need dari because the idea is separated from:

• dipisahkan dari dokumen biasa = separated from ordinary documents

If you use dengan, it usually means with or by means of, so it would sound unnatural here.

The correct phrase is:

• dipisahkan dari

One possible active version is:

• Di kantor, petugas memisahkan dokumen penting dari dokumen biasa.

Breakdown:

• petugas = staff / officer
• memisahkan = separates
• dokumen penting = important documents
• dari dokumen biasa = from ordinary documents

So:

• passive: dokumen penting dipisahkan
• active: petugas memisahkan dokumen penting

That change from memisahkan to dipisahkan is a very common active/passive pair in Indonesian.