papers/zoo-data-commons/sections/07-implementation.tex

\section{Implementation}

\label{sec:implementation}

\subsection{System Architecture}

\begin{figure}[H]
\centering
\begin{tikzpicture}[
    node distance=1.2cm,
    box/.style={rectangle, draw, rounded corners, minimum width=2.8cm, minimum height=0.7cm, text centered, font=\footnotesize},
    edge/.style={->, thick}
]
    \node[box, fill=blue!10] (ingest) {Ingestion API};
    \node[box, fill=green!10, right=1.5cm of ingest] (validate) {Quality Engine};
    \node[box, fill=orange!10, right=1.5cm of validate] (store) {IPFS Storage};
    \node[box, fill=red!10, below=1cm of ingest] (index) {Search Index};
    \node[box, fill=purple!10, below=1cm of validate] (chain) {Zoo Blockchain};
    \node[box, fill=yellow!10, below=1cm of store] (access) {Access Control};

    \draw[edge] (ingest) -- (validate);
    \draw[edge] (validate) -- (store);
    \draw[edge] (validate) -- (index);
    \draw[edge] (store) -- (chain);
    \draw[edge] (chain) -- (access);
    \draw[edge] (index) -- (access);
\end{tikzpicture}
\caption{Zoo Data Commons system architecture.}
\label{fig:architecture}
\end{figure}

\subsection{Software Stack}

\begin{table}[H]
\centering
\caption{ZDC software components.}
\label{tab:software}
\begin{tabularx}{\textwidth}{@{}llcX@{}}
\toprule
\textbf{Component} & \textbf{Language} & \textbf{Lines} & \textbf{Description} \\
\midrule
Ingestion Engine & Python & 7,200 & Darwin Core parsing, schema validation, format conversion \\
Quality Assessor & Python & 5,800 & Automated quality scoring, anomaly detection \\
IPFS Manager & Rust & 4,600 & Content-addressed storage, pinning management \\
Provenance Tracker & Rust & 3,900 & Hash chain construction, provenance query engine \\
Access Controller & Rust & 6,100 & ABE encryption, policy evaluation, DGC management \\
Search Service & Go & 8,400 & Distributed index, spatial queries, full-text search \\
Smart Contracts & Solidity & 2,800 & Curation market, staking, governance \\
Web Interface & TypeScript & 11,200 & Data explorer, upload wizard, governance dashboard \\
\bottomrule
\end{tabularx}
\end{table}

\subsection{Interoperability}

ZDC implements bidirectional synchronization with major biodiversity data platforms:

\begin{itemize}[leftmargin=*]
    \item \textbf{GBIF:} Darwin Core Archive export/import with ZDO-to-DwCA mapping.
    \item \textbf{iNaturalist:} Observation import with quality grade mapping.
    \item \textbf{GenBank:} Genetic sequence cross-referencing via NCBI accession numbers.
    \item \textbf{BOLD:} Barcode record linkage through specimen identifiers.
    \item \textbf{eBird:} Checklist import with observer reputation mapping.
\end{itemize}

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% 8. Evaluation
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