Yönetim planı ortak alanı içeriyor.

Because yönetim planı is a noun compound in Turkish.

• yönetim = management, administration
• planı = its plan / plan of

In Turkish, compounds like this often take a special ending on the second noun:

• okul kapısı = school door
• şehir merkezi = city center
• yönetim planı = management plan

So here, -ı is not the accusative case. It is the compound marker on the second noun.

That is why yönetim planı can be the subject even though it ends in -ı.

Here, -ı is the accusative ending.

• alan = area
• alanı = the area / the specific area as a direct object

The verb içermek / içeriyor takes a direct object, and in this sentence the object is specific, so Turkish uses the accusative:

• ortak alanı = the common area

So unlike planı, where -ı is part of a noun compound, in alanı it marks the direct object.

You tell from the structure and the role of each word in the sentence.

1. Yönetim planı

This is a fixed noun compound:

• yönetim
  • planı
• meaning management plan

It functions as one unit, and it is the subject.

2. Ortak alanı

This is:

• ortak = common
• alanı = area + accusative

It functions as the object of içeriyor.

A good clue is that Turkish sentences often end with the verb, so the noun right before the verb is often the object:

• Yönetim planı = subject
• ortak alanı = object
• içeriyor = verb

Yes, but more specifically it is what Turkish grammar usually calls an indefinite noun compound.

The pattern is:

• first noun: bare form
• second noun: takes a compound/possessive-type ending

So:

• yönetim planı = management plan
• literally something like management’s plan, but in normal English we usually translate it as management plan

This structure is extremely common in Turkish:

• otobüs durağı = bus stop
• yemek masası = dining table
• şehir planı = city plan

So yes, it looks possessive, but in many cases it is best understood as a standard noun compound.

Turkish basic word order is usually Subject + Object + Verb.

So here:

• Yönetim planı = subject
• ortak alanı = object
• içeriyor = verb

That gives:

• Yönetim planı ortak alanı içeriyor.

This is the most neutral and expected order.

Turkish word order is flexible, but changes in order often affect emphasis. For example, moving the object earlier or later can sound more marked or focus on a different part of the sentence.

The dictionary form is içermek.

Its basic meaning is to include, to contain.

In this sentence:

• içeriyor = includes / is including / contains

Turkish dictionaries usually list verbs in the -mek / -mak infinitive form, so if you want to look it up, search for içermek.

İçeriyor is in the present continuous form, built with -iyor / -ıyor / -uyor / -üyor.

Structure:

• içer- = verb stem
• -iyor = present continuous
• implied he/she/it ending = third person singular

So:

• içeriyor = he/she/it is including

But in Turkish, this form is also very often used for general present meaning in everyday language. So in a sentence like this, it can naturally mean:

• includes
• contains

not only is including.

Both can be possible, but they have slightly different feel.

• içerir = aorist/simple present; often sounds more formal, general, or definition-like
• içeriyor = present continuous form, but very commonly used in modern Turkish for present/general statements too

So:

• Yönetim planı ortak alanı içerir. = more formal or rule-like
• Yönetim planı ortak alanı içeriyor. = very natural in everyday Turkish

A learner should recognize both.

Turkish does not have articles like English the and a/an.

Whether something is definite or indefinite is usually understood from:

• context
• word order
• case endings

In this sentence, alanı has the accusative ending, which strongly suggests a specific object. That often corresponds to English the:

• ortak alanı = the common area

So Turkish often expresses definiteness without a separate word like the.

Yes, but the meaning would change.

Compare:

• ortak alan içeriyor
• ortak alanı içeriyor

With many transitive verbs, the accusative marks a specific/definite object. Without it, the object is often less specific or more general.

So:

• ortak alanı içeriyor = includes the common area / a specific common area
• ortak alan içeriyor = includes common area / includes a common area, depending on context

In real usage, the accusative helps show that a particular area is being referred to.

Here, ortak is an adjective.

• ortak = common, shared
• alan = area

So:

• ortak alan = common area / shared area

This is different from yönetim planı, which is a noun compound. In ortak alan, the first word describes the second word like a normal adjective.

That is an important distinction:

• yönetim planı = noun + noun compound
• ortak alan = adjective + noun

Because Turkish adjectives do not agree with nouns the way adjectives do in many Indo-European languages.

In English, adjectives also stay the same:

• common area
• common areas

Turkish is similar in that way:

• ortak alan
• ortak alanlar

The adjective ortak does not change for number, gender, or case.

Only the noun changes:

• alan = area
• alanı = the area / area in accusative
• alanlar = areas

Because in Turkish, subject pronouns are often omitted when the verb form and context make the meaning clear.

Here, the subject is already stated:

• Yönetim planı

So there is no need to add a separate pronoun.

Also, the verb içeriyor is third person singular, which fits yönetim planı.

Turkish normally avoids unnecessary pronouns unless they are needed for emphasis or contrast.

Yes.

The verb içermek often corresponds to both:

• to include
• to contain

Which English translation is best depends on context.

For example:

• a document may include a section
• a plan may contain rules
• a list may include certain items

In this sentence, either includes or contains may work, depending on the meaning already given to the learner.

You would add the negative marker -m- before the tense ending:

• içeriyor = includes / is including
• içermiyor = does not include / is not including

So the full negative sentence would be:

• Yönetim planı ortak alanı içermiyor.

That means the management plan does not include the common area.

You would add the question particle mu / mı / mü / mi separately:

• Yönetim planı ortak alanı içeriyor mu?

This means:

• Does the management plan include the common area?

Notice that the question particle is written separately from the verb.

A useful breakdown is:

• Yönetim = management / administration
• planı = plan (with compound ending)
• ortak = common / shared
• alanı = area (accusative)
• içeriyor = includes / contains / is including

So structurally:

• Yönetim planı = management plan
• ortak alanı = the common area
• içeriyor = includes

This is a good sentence for seeing two different -ı endings that do different jobs.