ΤΙΜΟΛΗΨΙΑ ΕΙΔΩΝ SUPER MARKET ΑΠΟ ΙΑΝΟΥΑΡΙΟ 2025 ΕΩΣ ΑΥΓΟΥΣΤΟ 2026

Dataset Overview & Methodology This dataset captures official retail price monitoring records for essential food and consumer grocery items collected by the Region of Central Macedonia - Department of Commerce. The records span a twenty-month observation period from January 31, 2025 to August 31, 2026, gathered on a recurring monthly cadence. The entire dataset adheres strictly to the international Open Prices open-data standard developed by Open Food Facts. Categorical taxonomy alignment is mapped against the official Open Food Facts Categories Taxonomy, covering granular items such as specific fresh beef cuts, poultry, seafood, PDO cheeses, edible oils, legumes, and pantry staples. A key architectural feature of this dataset is that price collections evaluate two distinct supermarket chains per sampling date. Rather than merging prices across chains into an artificial composite row, the pipeline extracts and records each chain as an independent, separate row. This approach retains full market transparency, enabling chain-to-chain comparative pricing analysis alongside timeline inflation tracking. Data Schema & Field Definitions The exported schema includes specific columns populated with clean, standardized data: type: The record entity type within the Open Prices specification, set constantly to PRODUCT. product_name: The clean commercial name of the product in Greek as documented by official price surveyors, stripped of trailing parentheses and package sizing notes while retaining substantive cut/type attributes (e.g., (Α.Ο.) for boneless meats). category_tag: The mapped taxonomy category code from the Open Food Facts taxonomy (e.g., en:beef, en:cod-fillets, en:virgin-olive-oils, en:feta). labels_tags: Quality and certification identifiers, populated with en:organic when organic certifications (ΒΙΟΛΟΓΙΚΑ / BIO) are present. origins_tags: Geographic indication and origin tags, assigned as en:greece for domestic Greek products and registered PDO items (such as Feta, Kasseri, or Extra Virgin Olive Oil). min_price: The lowest price (ΚΑΤΩΤΕΡΗ) recorded for this product within the specific supermarket chain during the survey round. max_price: The highest price (ΑΝΩΤΕΡΗ) recorded for this product within the specific supermarket chain during the survey round. price: The representative baseline price for this chain, calculated as the mean between the store's recorded minimum and maximum prices. price_is_discounted: A boolean flag indicating promotional pricing, set to False as these reflect regular market surveillance figures. price_without_discount: Stored identically to price to satisfy the Open Prices schema requirements. quantity: The numeric measure of the item package size (e.g., 500, 1.5, 6) parsed dynamically from the product text. price_per: The standardized measurement unit enum matching Open Prices standards (KILOGRAM, GRAM, LITRE, MILLILITRE, or UNIT). currency: The ISO currency code of the transaction, set uniformly to EUR. date: The effective calendar date of the price sampling round in ISO format (YYYY-MM-DD). receipt_quantity: The item count unit multiplier, defaulted to 1.0. owner: The governmental agency conducting the surveillance, set to Region of Central Macedonia - Department of Commerce. source: The source description identifying both the surveying authority and the sampled chain (e.g., Region of Central Macedonia - Department of Commerce - Supermarket 1). created / updated: ISO timestamps marking the script generation run. proof_file_path: The latinized filename of the original primary source Excel file. proof_type: The Open Prices evidence classification, designated as SHOP_IMPORT. proof_date: The date associated with the official bulletin file (YYYY-MM-DD). proof_currency: The currency of the proof record (EUR). proof_owner: Assigned to Region of Central Macedonia - Department of Commerce. proof_source: The full provenance descriptor matching source. proof_created / proof_updated: Audit timestamps reflecting the processing run. location_osm_display_name: The physical establishment descriptor combining geographic jurisdiction and chain label (e.g., Region of Central Macedonia - Supermarket 1). location_osm_tag_key / location_osm_tag_value: OpenStreetMap feature classification tags, assigned as shop and supermarket. location_osm_address_city: The urban administrative center (Thessaloniki). location_osm_address_country: The country name (Greece). location_osm_address_country_code: The ISO country code (GR).