 Krishnan Narayana Swamy 

Picture yourself establishing a home office and determining the essential products you need to purchase. You&rsquo;ll likely conduct research on different home office setups, make some initial decisions on which products to buy, and then conduct a text-based search on your preferred eCommerce platform.
<a href="https://ptc-computer.com.kh/">PTC Computer's</a> vision was to transform how users engage with their eCommerce platform. The PTC eCommerce platform front-end communicates with backend REST APIs built on PHP (deployed with <a href="https://laravel.com/">Laravel</a>) and MySQL (deployed in <a href="https://www.digitalocean.com/">Digital Ocean</a>). Recognizing the limitations of their MySQL database, they sought a solution that could power their vision effectively. After careful consideration, they chose to partner with <a href="http://www.datastax.com">DataStax</a> to build:&nbsp;
<ol>
<li style="font-weight: 400;" aria-level="1">A next-generation multi-modal (text, voice, and image) and multilingual (English and Khmer) enhanced AI search engine to help users find the right products</li>
<li style="font-weight: 400;" aria-level="1">An AI assistant that offers personalized product recommendations, provides customer support and engages with customers via voice in English and Khmer.</li>
</ol>
With the AI assistant, PTC customers get a seamless omnichannel experience, whether they visit the store and interact with the self-service kiosk, web page, or mobile application. The PTC team is developing features to empower their store sales associates with customer insights gathered from all channels.
<img style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.sanity.io/images/bbnkhnhl/production/6f935c8bc171f59f436ee2f2e0ababb925c9c175-1914x1006.png" alt="" width="620" height="326" />
<h2>PTC&rsquo;s architecture</h2>
<a href="https://www.datastax.com/products/astra-streaming">Astra Streaming's</a> real-time data pipelines are set up to retrieve pertinent and valuable contextual data swiftly. This includes product inventory, customer profiles, preferences, past interactions across different channels, previous purchases, product documentation, images, manuals, warranty policies, and support knowledge base information. This data is instantly acquired using change data capture (CDC) patterns from existing platforms. Subsequently, employing large language models and multi-modal models contextualizes this enterprise data, storing it efficiently in <a href="https://www.datastax.com/products/datastax-astra">DataStax Astra DB</a>.
<img style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.sanity.io/images/bbnkhnhl/production/57463dc6175068823dbd6c62372bd4c2944724ce-1999x1287.png" alt="" width="620" height="399" />
Customers using PTC&rsquo;s webpage or mobile application can now use natural language queries, voice in their local language (Khmer), and images to interact with AI-powered search or the conversational AI Assistant. If required, the user query is translated to English and analyzed using the <a title="What is a Large Language Model" href="https://www.datastax.com/guides/what-is-a-large-language-model">LLM</a> to classify intent and route the query to the appropriate flow.&nbsp;
<h2>Hybrid search</h2>
LLMs are leveraged to perform named entity recognition to extract keywords like brand, category, specifications, and price and to perform hybrid searches to provide better relevance to search queries. <a href="https://www.datastax.com/products/vector-search">Astra DB&rsquo;s vector search </a>provides this capability with <a href="https://docs.datastax.com/en/astra-serverless/docs/vector-search/using-analyzers.html">Index Analyzers</a> for <a href="https://www.datastax.com/dev/cassandra-indexing">storage attached indexes (SAI),</a> unlocking Astra users' text search. It allows you to find individual words (or stemmed tokens) that have been indexed in a text column, just like other WHERE clauses. This capability combines <a title="What is Vector Search" href="https://www.datastax.com/guides/what-is-vector-search">vector search</a> (<a title="What is Nearest Neighbor" href="https://www.datastax.com/guides/what-is-nearest-neighbor">approximate nearest neighbor</a>, or ANN) and other SAI indexes to achieve hybrid search.&nbsp;
<h2>Conversational memory</h2>
The AI Assistant leverages a well-established architecture pattern named <a href="https://docs.datastax.com/en/astra-serverless/docs/vector-search/chatbot-quickstart.html">retrieval-augmented generation (RAG)</a>. All the assistant data, including the user questions and the assistant responses, chat history, and associated customer behavior, feeds back into Astra DB. This enables the user to have a human-like conversation with the &ldquo;memory&rdquo; of past questions and answers; the assistant also incorporates this into its current thinking.&nbsp;
<h2>Data analytics and customer segmentation</h2>
With all the previous engagement history, browsing history, and purchases, the AI Assistant agent can talk to a customer differently if the customer is identified as having high intent to buy versus just browsing. This data collection is powerful and can be used to further segment and/or profile customers to run targeted promotional campaigns that translate to increased sales and revenue.
<img style="display: block; margin-left: auto; margin-right: auto;" src="https://cdn.sanity.io/images/bbnkhnhl/production/7c5da816a1a5d5630dc297e3c1c15d88e60a68e2-1999x819.png" alt="" width="640" height="262" />
Astra DB minimized hallucinations with higher relevance, providing more throughput and faster response times for PTC. Real-time data and ecosystem integrations through <a href="https://docs.datastax.com/en/ragstack/docs/index.html">RAGStack</a> made it easier for PTC developers to build production-ready <a title="What is Generative AI" href="https://www.datastax.com/guides/what-is-generative-ai">GenAI</a> applications faster. Reading and indexing data at the same time and the ability to store all the vector and structured data together to build a complete RAG application helped the PTC team provide a better user experience.&nbsp;
<h2>What&rsquo;s next?</h2>
As the team continues to innovate, it will provide an improved personalized experience and improve efficiency by automating processes through the AI assistant. The AI assistant will guide the customer to checkout, query delivery status, answer questions about products, solve any technical issues through the support knowledge base, and help submit warranty claims.&nbsp;
<a href="https://www.datastax.com/products/vector-search">Get started building on Astra DB for free</a>.

How PTC Is Transforming eCommerce with Generative AI, DataStax Astra DB, and Vector Search

Krishnan Narayana Swamy Field CTO, APJ

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