Transform Any ContentInto Structured Data.

using LMKit.Model;
using LMKit.Extraction;
using LMKit.Data;

// Load model (text or vision-language model for images)
var model = LM.LoadFromModelID("gemma3:4b");

// Create extraction instance
var extraction = new TextExtraction(model)
{
    Title = "Invoice Parser",
    Description = "Extract invoice details from documents",
    NullOnDoubt = true
};

// Define extraction schema with nested objects and arrays
extraction.Elements = new List<TextExtractionElement>
{
    new("InvoiceNumber", ElementType.String, "Invoice identifier")
    {
        Format = new TextExtractionElementFormat
        {
            IsRequired = true,
            TextCaseMode = TextCaseMode.Uppercase
        }
    },
    new("Vendor", ElementType.String, "Vendor company name"),
    new("Date", ElementType.Date, "Invoice date"),
    new("Total", ElementType.Double, "Total amount"),
    new("LineItems", ElementType.Object, "Invoice line items")
    {
        IsArray = true,
        InnerElements = new List<TextExtractionElement>
        {
            new("Description", ElementType.String),
            new("Quantity", ElementType.Integer),
            new("UnitPrice", ElementType.Double)
        }
    }
};

// Load content (text, image, or PDF)
extraction.SetContent(new Attachment("invoice.pdf"));

// Or extract from specific pages
// extraction.SetContent(new Attachment("invoice.pdf"), pageIndex: 0);

// Parse and get results
TextExtractionResult result = await extraction.ParseAsync();

// Access typed values
var invoiceNum = result.GetValue<string>("InvoiceNumber");
var total = result.GetValue<double>("Total", 0.0);
var confidence = result.GetConfidence("Total");

// Enumerate array items
foreach (var item in result.EnumerateAt("LineItems"))
{
    var desc = item.Get("Description").As<string>();
    var qty = item.Get("Quantity").As<int>();
    Console.WriteLine($"{desc}: {qty} units");
}

// Get raw JSON output
Console.WriteLine(result.Json);

// Overall confidence score
Console.WriteLine($"Confidence: {result.Confidence:P0}");