Here, by the way, we need to think through some system of metrics and object classification, not only by quality, but also by focus/orientation. For example, if a person doesn't want caves, they definitely don't need grottoes, etc. If they are choosing an evening dress, they hardly need Ha Long Bay or diving. If someone is looking for a restaurant or casino in the city, they don't need a waterfall. Conversely, if they are heading towards a mountain, why not drop by a resort base that has a stream, a cave, a restaurant, and something else as well. By the way, these combinations of places are definitely needed. There are recreation centers that have camping, food, a cave, and a place to swim. You can hang out there for a couple of days. And you can not leave the Pearl Island in Nha Trang for 3 days.

Here are ChatGPT's thoughts:

Yes — here we need not just a taxonomy of places, but a system of compatibility, intent, and object "capacity".

The problem is that the type of object itself says almost nothing about why a person is going there and how many needs it can fulfill.

For example:

• "cave" is a type;
• "active recreation", "nature", "for half a day", "not suitable for claustrophobia" — this is already orientation/focus;
• "tourist complex with a cave, restaurant, swimming, and overnight stay" — this is generally a composite object that can replace several separate route points.

Three different classification layers are needed

1. What it is

This is your current typology:

• cave;
• waterfall;
• restaurant;
• beach;
• casino;
• diving;
• pagoda;
• park;
• camping;
• hotel.

It is necessary, but not sufficient.

2. Why people go there

This is user intent:

• nature;
• active recreation;
• romance;
• evening outing;
• food;
• shopping;
• entertainment;
• traveling with children;
• nightlife;
• relaxing vacation;
• adventure;
• photogenic spot;
• wellness;
• cultural program.

This is where your examples come in:

• a person is looking for an evening dress → they need shopping, the city center, a restaurant, an evening program;
• looking for a casino → they need nightlife, restaurants, hotels, evening transport;
• going to a mountain → they can be offered a cave, a stream, a viewpoint, a cafe, a campsite;
• doesn't like caves → caves, grottoes, underground temples, and similar objects are excluded.

3. How the object behaves in the route

This is already operational classification:

• for 30 minutes;
• for 2 hours;
• for half a day;
• for a day;
• for 2–3 days;
• can be combined;
• better separately;
• transit point;
• base point;
• destination point;
• self-sufficient complex;
• requires overnight stay;
• depends on weather;
• requires booking;
• suitable only at a certain time of day.

This is critically important for the route.

---

The entity "complex" or "cluster" is needed

What you describe with recreation bases and Pearl Island cannot be modeled simply as a regular place.

We need to introduce the concept:

Composite object / tourist complex

It can include:

• restaurants;
• hotels;
• beaches;
• attractions;
• caves;
• camping;
• swimming pool;
• spa;
• routes;
• shows;
• retail;
• internal territory transport.

Examples:

• resort;
• island complex;
• national park;
• recreation base;
• theme park;
• large temple complex;
• mountain cluster;
• beach cluster;
• eco-park.

It should have its own properties:

• minimum recommended time;
• maximum reasonable time;
• can you stay overnight;
• can you eat on-site;
• is there internal transport;
• how many activities are inside;
• is it suitable as a standalone part of the trip.

For example:

Pearl Island Type: tourist complex Recommended duration: 1–3 days Fulfills needs: beach, entertainment, food, children, show, accommodation

Then the system understands: this is not just a single point for two hours, but a route container.

---

Useful object model

For each object, I would add a set of attributes.

Thematic attributes

• nature;
• food;
• shopping;
• history;
• religion;
• adventure;
• water;
• mountains;
• nightlife;
• entertainment;
• wellness;
• children;
• romance;
• photography.

Undesirable attributes

This is equally important.

• confined spaces;
• height;
• physical exertion;
• crowds;
• noise;
• heat;
• water;
• animals;
• religious restrictions;
• long transfer;
• extreme activity.

If a person says "I don't like caves", the system should exclude not only the cave type, but also the attributes:

• underground object;
• grotto;
• tunnel;
• tight space;
• speleology.

That is, you need not only positive interests, but also anti-preferences.

---

"Needs" fulfilled by the object are needed

This is a separate strong idea.

Each place can fulfill one or more needs:

• eat;
• stay overnight;
• swim;
• entertain children;
• relax;
• walk;
• view nature;
• buy things;
• get emotions;
• spend the evening;
• take shelter from rain;
• spend a whole day without moving places.

For example:

Waterfall

Fulfills:

• nature;
• photos;
• walk;
• swimming — sometimes;
• activity.

Casino

Fulfills:

• evening;
• entertainment;
• nightlife;
• restaurant — sometimes.

Tourist base

Fulfills:

• food;
• nature;
• swimming;
• overnight stay;
• activity;
• 1–2 day vacation.

Then the route can be built not around the number of points, but around the balance of fulfilled needs.

---

Object metrics are needed

I would divide them into several groups.

Attractiveness

• uniqueness;
• visual value;
• popularity;
• quality of experience;
• reputation;
• relevance.

Logistics

• remoteness;
• accessibility;
• travel time;
• access difficulty;
• availability of parking;
• transport dependence.

Time capacity

• minimum time;
• recommended time;
• maximum reasonable time;
• can it occupy half a day;
• can it occupy a whole day;
• can you stay for the night.

Composition

• number of activities;
• number of services;
• presence of food;
• presence of accommodation;
• presence of entertainment;
• presence of natural objects;
• self-sufficiency.

Context

• suitable in the morning;
• suitable in the evening;
• suitable in rain;
• suitable in heat;
• suitable with children;
• suitable without a car;
• suitable for a couple;
• suitable for solo.

---

"Utility density" is very important

You can introduce an internal metric:

How many different needs are fulfilled in a single point

For example:

Regular waterfall

• nature;
• photos;
• walk.

Utility density: medium.

Recreation base

• nature;
• swimming;
• food;
• overnight stay;
• cave;
• camping;
• activity.

Utility density: high.

Large island complex

• beach;
• attractions;
• restaurants;
• shows;
• hotels;
• children;
• evening program.

Utility density: very high.

Such objects need to be displayed differently in the route:

"This point can take 2–3 days and replace several separate trips."

---

Connections are needed not only between places, but also inside complexes

Connections can be as follows:

• part of the complex;
• located on the territory;
• available only through the complex;
• can be visited separately;
• included in a general ticket;
• requires a separate ticket;
• works at different hours;
• best visited in a certain sequence.

For example:

Pearl Island Includes:

• water park;
• beach;
• restaurants;
• shows;
• cable car;
• hotels.

The user can:

• add the whole complex;
• add only a part;
• add the complex for 1 day;
• add the complex for 3 days.

---

How to apply this to recommendations

The system should first determine the user's intent, and only then select object types.

Example:

The user is looking for an evening dress.

Intentions:

• shopping;
• city;
• evening;
• possibly restaurant;
• possibly photogenic spot;
• minimal travel.

Inappropriate categories:

• diving;
• waterfalls;
• caves;
• remote bays.

Appropriate combination:

shopping mall → salon/boutique → restaurant → bar/show

Another example:

The user is going to a mountain.

Intentions:

• nature;
• activity;
• panoramas;
• possibly a full day.

Additional connections:

• stream;
• cave;
• cafe;
• camping;
• viewpoint;
• recreation base;
• overnight stay.

And then the system offers not "another mountain", but a ready-made cluster of impressions.

---

Route classification

The route should also have a focus/orientation:

• urban;
• natural;
• gastronomic;
• evening;
• family;
• adventure;
• romantic;
• beach;
• mixed;
• without transfers;
• with high activity density;
• relaxed.

And balance:

• 70% nature / 30% city;
• 50% rest / 50% activity;
• 20% shopping / 30% food / 50% entertainment.

This will make it possible to check whether the route has "broken".

For example:

The user wants a quiet beach holiday, but the route consists 60% of travel and activities.

The agent should say:

The route does not match your preferences.

---

The most useful new entity

I would add not only complex, but also scenario.

Scenario examples:

• rainy day;
• evening in the city;
• two days without leaving the complex;
• trip with a child;
• romantic evening;
• active day in the mountains;
• car-free day;
• stopover on the way between cities.

The scenario connects:

• intentions;
• limitations;
• place types;
• complexes;
• time;
• sequence of actions.

---

Minimal model

To your entities:

• province;
• city;
• place type;
• place;

I would add:

• complex;
• scenario;
• need;
• interest;
• anti-preference;
• activity;
• service;
• route profile.

And connections:

• place is part of the complex;
• place fulfills a need;
• place fits a scenario;
• place conflicts with a preference;
• place complements another place;
• place replaces another place;
• place requires a separate day;
• place can be visited on the way;
• complex is designed for N days.

Main conclusion

It is better to build the system not around the question:

"What kind of place is this?"

But around three questions:

Why go there? How much time can it take? What needs does it fulfill?

And separately highlight composite objects where a person can actually spend a day, two, or three without having to travel to dozens of scattered points.

This is all relevant to this worklog.