Akylly ulgamlaryň aňyndaky akyl
⚡ AI-esasly · ElpoCore platformasynda

SmartERP
Täzeden oýlanyldy

Hasapçylyk, ammar, satuw, satyn alyş, önümçilik, HR — ElpoCore AI platformasynda işleýän täze nesil ERP, modullary AI bilen gepleşip sazlaň.

Däp bolan ERP-lerden tapawutlylykda, SmartERP ElpoCore platformasynyň üstünde işleýär. Gerekli moduly suratlandyryň, AI ony ýazsyn, minutlaryň içinde sisteme goşulsyn — kodsuz.

SmartERP Login
Dashboard
🖥️ SmartERP
Dashboard
Talk to AI
🖥️ SmartERP
Talk to AI
Form Builder
🖥️ SmartERP
Form Builder
Report Builder
🖥️ SmartERP
Report Builder
Marketplace
🖥️ SmartERP
Marketplace
Theme System
🖥️ SmartERP
Theme System
🏗️ ElpoCore platformasynyň direglik sütunlary

Işleýän platforma

SmartERP lives on top of the ElpoCore platform. The same platform also runs the e-Document Integrator, 12 industry packs and customer-specific apps. One engine, unlimited applications.

🧬

Metadata Engine

Five metadata types: entity, field, validation, UI and rule. Single source, multiple outputs (DB, API, UI).

🎨

Generic UI Renderer

Automatic React UI from metadata. Form, list, detail and dashboard are all generated.

⚙️

Workflow Engine

BPMN-based workflow, state machine, approval chain and scheduled jobs.

🏢

Multi-Tenant + RLS

Each organisation = one tenant = one DB or one schema. Row Level Security isolates the data.

🔌

Plugin Host

Microkernel architecture. Third-party plugins run in a sandboxed host.

📜

Script Runtime

C# scripting via Roslyn. Custom business logic and computed fields.

🧩 ElpoCore.Apps.SmartERP v2.0

Ýerleşdirilen biznes hyzmatlary

SmartERP runs on the ElpoCore platform as a manifest-driven app. Standard entities are produced from metadata; the built-in business services below provide the real calculation logic (payroll, VAT declaration, MRP explosion, fixed-asset depreciation, etc.).

📊 Hasapçylyk

Uniform chart of accounts, journal entries, balance sheet, income statement, fixed assets, VAT declaration and period-end close.

  • Balance Sheet · Income Statement
  • Trial Balance · GL Report
  • Fiscal Period Close · Year-End
  • Fixed Asset Depreciation
  • VAT Declaration · Journal Posting
🤝 CRM

Customer 360, pipeline, lead scoring, opportunity won/lost and quote-to-order conversion.

  • Customer 360 · Pipeline
  • Lead Scoring · Activity Reminder
  • Opportunity Won/Lost
  • Quote-to-Order
💰 Aýlyk haky

Turkish payroll calculation, overtime, severance, leave accrual and attendance tracking.

  • Turkish Payroll Calculator
  • Overtime Calculator
  • Severance Calculator
  • Leave Accrual · Time Attendance
  • Payroll Period Run
🏭 Önümçilik

Work orders, MRP explosion, capacity planning, operation tracking and quality control.

  • Work Order · Operation
  • MRP Explosion
  • Capacity Planning
  • Quality Control
📦 Ammar

Inventory valuation (FIFO/LIFO/Moving Avg), reorder point, stock count, movements and reservations.

  • Inventory Valuation
  • Reorder Point
  • Stock Count · Movement
  • Stock Reservation
🎯 Görkeziji

OKR cascade, performance appraisal cycle, 360° feedback, KPI calculation and bonus.

  • Appraisal Cycle · OKR Cascade
  • 360° Feedback · KPI Calculation
  • Bonus Calculation
📄 e-Resminama / GİB

Tax-authority e-Invoice and e-Despatch XML generation (UBL-TR 1.2.1). E-Integrator + GIB Direct as two output paths.

  • EInvoice XML Builder
  • EDespatch XML Builder
  • E-Integrator Client (HTTP retry)
  • GIB Direct Client
📅 Salgyt senenamasy

Automatic Turkish tax deadline calculation (VAT, withholding, corporate, advance).

  • Tax Deadline Calculator
  • Notification & alerts

Source: ElpoCore.Modules.Turkey · Turkey localisation pack

🏭 12 pudak paketi

Pudagyňyza laýyk, taýýar

From textile to pharmacy, from restaurant to automotive — 12 industry packs ship with industry-specific entities, form templates, AI assistants and cross-module flows. Idempotent installation: reinstalling the same pack preserves your data.

👕

Eşik we Dokma

apparel 32 obýekt
💊

Dermanhana

pharmacy 28 obýekt
🍽️

Restoran we Kafe

restaurant 24 obýekt
👟

Aýakgap

footwear 30 obýekt
🚗

Awtomobil

automotive 30 obýekt
🏗️

Gurluşyk

construction 30 obýekt
💄

Kosmetika

cosmetics 30 obýekt
🎓

Bilim

education 30 obýekt
🥫

Iýmit we Içgi

foodbeverage 30 obýekt
🛋️

Mebel

furniture 30 obýekt
🏥

Saglygy goraýyş

healthcare 30 obýekt
🚚

Logistika

logistics 30 obýekt

Each pack contains: catalogs/ + documents/ + registers/ + rules/ + form-templates/ + ai-agent-defaults/

🌍 3 ýurt paketi taýýar

Ýerli kanun, ýerli hasapçylyk

ElpoCore's CountryPack architecture ships each country's accounting standard, e-invoice format and tax structure as a separate pack. The core stays untouched.

Ýurt Hasapçylyk standarty e-Faktura Salgyt Ýagdaý
🇹🇷 Türkiýe Uniform Chart (VUK) UBL-TR 1.2.1 / GİB VAT 0/1/10/20% Taýýar
🇺🇸 ABŞ GAAP Federal + State Taýýar
🇩🇪 Germaniýa HGB · SKR03/04 USt 7/19% Taýýar

A new country is added as ElpoCore.Apps.CountryPack.<XX>

Build Applications with AI
01 / 06

Build Applications with AI

The most powerful feature of the ElpoCore platform: in plain language type "I want a customer-tracking system with phone, name and last-contact date" — let the AI generate the entity, fields, validation, REST API and form for you.

  • Natural-language metadata generation
  • Automatic PostgreSQL table + REST endpoint + React form
  • Drag-and-drop customisation via the Configurator UI
  • Error catching and fix suggestions
Dashboard and Platform Management
02 / 06

Dashboard and Platform Management

All applications, objects, users, tenants and AI usage on a single screen. Manage ELPO sidecar services (elpobi, elpobpm, elpoflow) from one place.

  • Application, object, user and tenant statistics
  • AI usage tracking (tokens, cost, calls)
  • ELPO sidecar services (elpobi, elpobpm, elpoflow)
  • Latest activities and system health
30+ Themes and White-Label
03 / 06

30+ Themes and White-Label

A multi-theme system: 30+ ready-made colour palettes, a custom colour picker, light/dark mode, font family and spacing settings. A white-label solution in your own brand for your customers.

  • 30+ ready theme presets (Eqe Default, Dark Pro, Ocean, Sunset, etc.)
  • Custom colour palette via colour picker
  • Light/Dark mode, comfortable/compact density
  • Site-wide font and typography control
Form Builder
04 / 06

Form Builder

Design forms by drag-and-drop. Validation, conditional logic, custom widgets. The form you produce comes alive in the app instantly.

  • Drag-and-drop form design
  • 20+ field types (text, number, date, select, file, rich-text…)
  • Validation rules and conditional visibility
  • Custom widget support
Report Builder
05 / 06

Report Builder

Pivot tables, calculated fields, drill-down and charts. Generate reports, share them, schedule automatic delivery. Rich BI reports without SQL.

  • Visual report design (no code required)
  • Pivot tables, calculated fields, drill-down
  • Chart types (line, bar, pie, heatmap, scatter)
  • Schedulable export (PDF, Excel, e-mail)
Marketplace (coming soon)
06 / 06

Marketplace (coming soon)

Ready application packs: Accounting, Inventory, Sales, HR, e-Document. The .elpoapp package format and marketplace infrastructure (publisher + listing tables) are ready; the third-party publishing flow is in progress.

  • .elpoapp package format defined
  • One-click installation, automatic tenant provisioning (skeleton)
  • Version management and updates
  • Third-party publisher registration — on the roadmap
🤖 56 işjeň AI agenti

Her modulda ýerleşdirilen AI

Routed via the ElpoAIapi gateway: 56 SmartERP-relevant agents + ElpoCore platform agents. Unlike enterprise ERP Copilot add-ons, they are not a premium add-on — included in the base package, with low cost thanks to the free LLM chain.

💰

Maliýe we Hasapçylyk

13 işjeň AI agenti

13
  • Hasaplar Meýilnamasyny Sazlamak
  • Akylly Žurnal Generatory
  • Salgyt Hasaplaýjy
  • Deklarasiýa Taýýarlaýjy
  • Pul Akym Çaklamasy
  • Býujet Maslahatçysy
  • IFRS / GAAP Sazlamak
  • Bank we AR Sazlamak
  • GİB Ssenariý Tassyklamasy
  • Germaniýa GBS (UStVA)
  • ABŞ Satuw Salgydy
  • ÝB e-Faktura (ES/FR/IT)
  • Maliýe Çaklamasy
📦

Ammar / Satyn alyş / Önümçilik

6 işjeň AI agenti

6
  • Ätiýaçlyk Çaklamasy
  • Ammar Anomaliýa Tapmak
  • MRP Maslahatçy
  • Baha Maslahatçy
  • Üpjünçi Bahalandyrmak
  • Arzanladyş Tassyklaýjy
🤝

Satuw / CRM

5 işjeň AI agenti

5
  • Müşderi 360 Profili
  • Awtomatik Bahalamak
  • Kross/Ýokary Satuw
  • Indiki Iň Gowy Hereket
  • Hat Şablon Ýazyjy
👥

HR / Aýlyk haky

6 işjeň AI agenti

6
  • CV Süzgüji
  • Görkeziji Syn Kömekçisi
  • Dynç alyş Tassyklama Logikasy
  • Çalşyk Optimizasiýasy
  • Türgenleşik Maslahatçy
  • Guramaçylyk Üýtgeşme Derňewi
📄

Resminamalar

5 işjeň AI agenti

5
  • Faktura Derňewi
  • OCR Resminama Okaýjy
  • PDF Şablon Generatory
  • Awtomatik Klasifikasiýa
  • Awtomatik Belgilemek
🧹

Maglumatlar Hili

5 işjeň AI agenti

5
  • Maglumatlary Arassalamak
  • Maglumatlary Baýlaşdyrmak
  • Gaýtalanmalary Tapmak
  • Import Kartografçy
  • Maglumat Göçürme Kömekçisi
📊

Hasabat we Derňew

8 işjeň AI agenti

8
  • Tebigy Dil Soragy
  • Tebigy Dil Hasabaty
  • Diagramma Görnüş Maslahatçy
  • Tagta Dizaýneri
  • Ýolbaşçylyk Gysgaça
  • KPI Maslahatçy
  • Tendensiýa Derňewi
  • Audit Düşündiriji
⚙️

Iş Akymy / Operasiýalar

8 işjeň AI agenti

8
  • Tassyklama Akym Generatory
  • Tassyklama Logika Kömekçisi
  • Awtomatik Iş Bermek
  • Ýagdaý Maşyn Generatory
  • Barlag Düzgüni Generatory
  • Rugsat Maslahatçysy
  • Meýilnamaçy Maslahatçy
  • Webhook Ýalňyşlyk Derňewi

Across the entire ELPO ecosystem: 108+ agents · 14 LLM providers · free fallback chain (groq → qwen → gemini → openrouter → deepseek → anthropic) · BYOK supported

🚀 Ýakynda — 12 täze AI mümkinçiligi

Bäsdeş ERP-leriň başaryp bilmeýäni

Twelve capabilities that are missing or weak in the AI layers of the big ERPs — built deep thanks to ElpoCore's metadata + multi-tenant + free-LLM foundation.

💸

Cash Application AI

Payment received → automatically matched to the right invoice. Paid module on big ERPs; here a free LLM chain.

🏦

Akylly Bank Sazlama

Bank statement ↔ ledger matching 95%+ automatic. Competing ERPs do it with manual rules; no AI version exists.

🛡️

Galplygy Tapmak

BEC scam, duplicate invoice, illogical VAT — pattern-based fraud protection.

📜

Şertnama Aňy

Extracts due dates, penalties and auto-renewal dates from PDF contracts. Proactive alerts before renewal.

🔔

Proaktiw Monitoring Agenti

Watches 24/7 — "three invoices fall due tomorrow", "cash flow goes negative tomorrow". Most ERPs only respond when asked; this one comes on its own.

🎙️

Ses → Forma

"New quote, customer Ahmet, product X" → the form opens already filled. A real differentiator on mobile.

🔎

Resminama Sorag-Jogap (RAG)

Ask questions of a contract/invoice PDF, get answers with source paragraph. pgvector + embedding infrastructure.

📈

Köp Üýtgejil Talap Çaklamasy

Weather + holidays + campaigns + sector trend combined forecast. Critical for restaurants, food and textile.

⚖️

Düzgünleşdiriş Gözegçisi

GIB circular published → list of impacted entities/records/reports. None of the local Turkish ERPs has this.

🎯

RFM + Kogort Segmentasiýasy

Automatic Champion/Loyal/At-Risk segmentation. Most ERPs need a separate analytics tool.

📑

IDP — Akylly Resminama Işläp Bejermek

Beyond OCR: layout-aware, tables + multi-page, Turkish handwriting. Premium IDP vendors sell this as a separate product.

🧩

Iş Akym Awto-Optimizatory

Watches the existing workflow → "this step is 92% approved, suggest auto-approval". Process-mining vendors charge a fortune for this.

Roadmap document (wave 1): docs/SMARTERP_AI_KATALOG.md + ELPOAIAPI_SMARTERP_V2_TALEP.md

🏦 Açyk Bank · ÖHVPS v2.0.0

35 türk banky bilen göni baglanyşyk

Your balance, your movements, your payments — all together with accounting on a single screen. Set up under the BKM Geçit standard, with the bank's strong authentication, by the customer's own consent.

⚖️

Technical Service Provider (TSP) model

SmartERP is a technical infrastructure provider under Law 6493 Article 10/2(ğ) and the CBRT 30 April 2023 Data-Sharing Services Guideline. The contract and liability with the bank rest with the customer; SmartERP never touches the funds and never decides on behalf of the customer. Therefore no additional licence/certification approval is required on the user side.

📊

Hasap maglumaty (AIS)

Unified account list, instant balance and movements from 35 banks — on a single screen.

💸

Şobada töleg (PIS)

EFT/Transfer/FAST one-off payment order — directly to the banks.

📅

Geljek senedäki töleg

Payment order to be sent automatically on a chosen date.

🔁

Gaýtalanýan töleg

Rent / subscription / supplier routines — RRULE-based recurrence.

🔐

Güýçli müşderi tassyklamasy

Redirect (web) or Decoupled (bank app) SCA — to the ÖHVPS v2.0.0 standard.

🔔

Waka habarnamasy (ODS/OAS)

Payment status changes are pushed instantly via webhook.

🤖

AI awto-klasifikasiýa

Each movement is automatically assigned to an income/expense category + counterparty matching (customer/supplier).

🛡️

Töleg galplyk goragy

AI screening before a new payment: new IBAN, abnormal amount, BEC-scam pattern detection.

35 birikdirilen ASPSP banky

2026-njy ýyldan başlap hemmesi sertifikatly
Akbank
T1
Garanti BBVA
T1
İş Bankası
T1
Yapı Kredi
T1
Ziraat Bankası
T1
Halkbank
T1
Vakıfbank
T1
DenizBank
T1
QNB Bank
T1
TEB
T1
Kuveyt Türk
T1
Albaraka Türk
Gatnaşma
Türkiye Finans
Gatnaşma
Ziraat Katılım
Gatnaşma
Vakıf Katılım
Gatnaşma
Enpara
Sanly
ING Bank
Depozit
Fibabanka
Depozit
Şekerbank
Depozit
Anadolubank
Depozit
Alternatifbank
Depozit
Burgan Bank
Depozit
ODEA Bank
Depozit
HSBC Bank
Depozit
TurkishBank
Depozit
Arap Türk Bankası
Depozit
Türkiye Emlak
Depozit
Hayat Finans
Gatnaşma
T.O.M. Katılım
Gatnaşma
Dünya Katılım
Gatnaşma
PTT
Poçta
Aktif Yatırım
Maýa goýum
Golden Global
Maýa goýum
Q Yatırım Bankası
Maýa goýum
Misyon Yatırım
Maýa goýum

Plus 7 payment-institution ASPSPs (Ahlatcı, Aköde, Iyzi, Lydians, Payporter, Turkcell Ödeme, Vakıf Elektronik Para)
Standard: ÖHVPS v2.0.0 · Ecosystem: 53 participants, 16.4M users, 12.3M daily transactions (CBRT 2026-03)

Master integration plan: docs/OHVPS_INTEGRATION_PLAN.md · AI agent request: docs/ELPOAIAPI_OHVPS_TALEP.md

🚀 2-tolkun — 12 niş AI mümkinçiligi

Premium niş mümkinçilikleri, ERP-e ornaşdyrylan

Niche/premium capabilities from finance automation, expense management, e-procurement, HR analytics, CRM AI, AP automation, production scheduling and customer-service AI will ship built-in in SmartERP.

📥

Awtomatik Žurnal Ýazgysy

Bank/voucher/invoice → uniform-chart journal suggestion that learns from past patterns.

📅

Aý Aýagy Ýapma Orkestratory

Checklist status, lateness-risk alert, owner notification, variance report.

🧾

Çykdajy Syýasaty Audity

Employee expense vs. policy comparison, automatic approve/reject. Mileage + per-diem aware.

📋

RFx Ýazyjy

RFI/RFQ/RFP document from a description, supplier shortlist, bid comparison matrix.

💼

Aýlyk haky Anomaliýasyny Tapmak

Is this month's payroll different from the historical average? Overtime, deduction and bonus deviation — flagged before close.

📉

Müşderiniň Gitmegini Çaklamak

Engagement + payments + orders + ticket sentiment → churn probability + recommended action.

📦

Akylly Sargyt Wadasy (ATP/CTP)

Stock + production + procurement combined → "yes/8 days, partial/4 days" decision.

💵

AR Ýygnamak Prioritetleýji

Open receivables risk × amount × relationship → top-10 of the day + best contact channel.

🔁

AP 3-taraply Sazlama

Order ↔ goods receipt ↔ invoice quantity/value gaps → auto-approve below the threshold.

🪦

Haýal/Ölü Stok Derňewçisi

ABC/XYZ analysis + "discount/promote/return/write-off" strategy + estimated loss.

🏭

Önümçilik Tertibini Optimizasiýa

Work orders → optimal sequencing by machine + setup + priority + delivery date.

💬

Bilet Sentiment + Ugratma

Customer mail/ticket → sentiment + urgency + category → right team + priority.

🌐 Keseligine mowzuk agentleri

Modullaryň arasyndaky AI mümkinçilikleri

Not tied to a single module — four core platform AI capabilities that run across SmartERP. Written once, used by every module.

🔍

Modullaryň arasyndaky semantik gözleg

"Total invoices Mr. Ahmet paid in the last 3 months" → SQL + UI link.

🩺

Hemişelik maglumat hili monitory

Empty fields, format violations, illogical values, duplication trend → daily health report.

🧪

Sintetik synag maglumatlary

Realistic Turkish names, tax IDs and plausible addresses for demo/staging — no KVKK/GDPR risk.

🕸️

Bilim grafigi guruçysy

Relationship graph between all entities, traversal answers for multi-hop questions.

Total roadmap: 28 new AI agents (12 main + 12 niche + 4 horizontal). Each lives inside the ElpoAIapi gateway — the prompt is not written in product code; the model changes, the prompt is updated, and all ELPO products pick it up automatically.

🧬 Platformadan miras

Däp bolan ERP-leriň başaryp bilmeýäni

Because SmartERP runs on top of the ElpoCore platform, platform capabilities missing from classic ERP packages are available on every screen.

⚙️

Forma içindäki dizaýner

every form

A ⚙️ button on every form screen — the user adds a new field in 5 seconds. Three layers: Platform / Tenant / User. Overrides survive when the upper layer is updated.

🤖

AI meýdan teklibi

every form

A 🤖 panel opens on the form; the entity-deepener agent analyses usage patterns and suggests missing fields — one click adds them.

🔗

Modullaryň arasyndaky baglanyşyk

8 types × 8 triggers

Rule-based links between modules: AutoFill, LookupChain, Derived, Event, Cascade. Draw it on a visual canvas studio, edit it in a tabular view.

🕒

Wagt syýahaty

every record

Every entity change is snapshotted. Pull the state of a record from a past date through the API (?asOf=…). Critical for compliance + audit.

🎯

360° görnüş

Customer · Product · Supplier · Employee

All movements, relations and AI summaries for a record on one screen. Walk 20-hop entity history back and forth with the DrillDownNavigator.

🧮

Hasaplanan meýdanlar

no code

Expression-based computed fields (Roslyn sandbox). Write fields like total amount, tax and margin in metadata; they are evaluated at runtime.

🔢

Resminama belgilemek

yearly · monthly · custom

Numbering rules for invoices, orders and despatches live in metadata: prefix, padding, reset cycle. Multi-tenant isolated, race-safe.

🚀

Çalt başlangyç gurnama

6 steps · seconds

New company setup: Company → Industry → Variant → Modules → AI Tailor → Done. The TenantOnboardingSaga builds schema + seed + admin in the background.

🎯 Kim ulanýar

Üç profil, üç çözgüt

From a 25-person SME manufacturer to a government agency and a software firm — SmartERP delivers the same engine in different models.

🏭
Profil

SME — 25 adamlyk önümçi

😩 Agyry nokady

"We can't get out of Excel; entering production data into accounting causes errors."

✨ Çözgüt

SaaS model — log in over a single domain with a company code. Production → Inventory → Accounting connected automatically. He told the AI "I need a production waste report" and it was ready in a minute.

📈 Peýda

3 days/month of manual data entry → 2 hours

🏛️
Profil

Döwlet edarasy — 500 işgär

😩 Agyry nokady

"Our data can't leave the premises, on-premise is mandatory, KVKK compliance is critical."

✨ Çözgüt

On-Premise model — on their own servers. Department-level data isolation with multi-tenant + RLS. Licensed + yearly support.

📈 Peýda

Data 100% inside, KVKK compliant, AI features used with their own LLM keys

💻
Profil

Programma üpjünçilik firmasy — öz önümini satýar

😩 Agyry nokady

"We don't want to build ERP plumbing; we want to focus on our own product."

✨ Çözgüt

PaaS API — SmartERP as the engine. Entity/record/AI calls through an API key + X-Tenant header. The customer-facing UI is their brand; ElpoCore runs behind it.

📈 Peýda

ERP plumbing that would take 6 months ready in 1 week, partner revenue-share model

🚀 3 ýerleşdiriş modeli

Bir kod, 3 dürli model

Pick what fits — the only difference is auth and tenant resolution.

1

On-Premise

Öz serweriňize gurnaň. Ygtyýarnama alyň, her ýyl täzeläň. Maglumatlaryňyz doly sizde galýar.

✓ Maximum data privacy
✓ One-off licence + yearly support
✓ Ideal for government and large companies
★ MEŞHUR
2

SaaS

Biz host edýäris. Firma kodyňyz bilen bir domeniň üsti bilen derrew başlaň. Serwer dolandyrmagy ýok.

✓ Monthly subscription
✓ Automatic backup + monitoring + updates
✓ Ideal for SMEs, start-ups and small businesses
3

PaaS (API)

Motor hökmünde ulanyň. REST API arkaly obýektler kesgitläň, ýazgylar iberiň we AI çagyryň.

✓ /v1/entities, /v1/records API
✓ AI generate endpoint
✓ Ideal for software firms
🏷️ White-Label hyzmatdaşlyk

SmartERP-ni öz brendiňiz bilen satyň

Logo, colour palette, font, domain (yourbrand.com) — the entire UI appears in your brand. The ElpoCore engine runs behind it; your customers don't even hear the name "ElpoCore". A revenue-share model for software firms, resellers and accountants.

01 · Brand
Full Branding

Logo, 30+ themes, custom colour picker, font, favicon, login screen — all yours

02 · Domain
Your Own Domain

erp.yourbrand.com · SSL · tenant resolver with company code ready

03 · Revenue
Partner Model

Licence + revenue share + first-line support is yours, core maintenance is ELPO's

Hyzmatdaş programmasynyň jikme-jikleri

AI bilen gepleşýän ERP-ni synaň

Unlike traditional ERPs — in SmartERP you describe the module you need to the AI and have it added in minutes.

WhatsApp arkaly ýaz