# Technical Document Extraction: Log Processing Diagram
This image illustrates a data preprocessing workflow where a continuous **System Log** is partitioned into discrete **Log Sequences** using a sliding window mechanism.
## 1. Component Isolation
The diagram is divided into three primary functional regions:
* **Source (Left):** A table representing the raw "System Log".
* **Transformation (Center):** Text and an arrow describing the logic applied to the source.
* **Output (Right):** A stack of tables representing the resulting "Log Sequences".
---
## 2. Source Data: System Log
The source is a structured table containing sequential log entries.
| Line # | Log Content |
| :--- | :--- |
| 1 | iar 00106ba8 dear 0246dd1c |
| 2 | 5052567 floating point alignment exceptions |
| 3 | CE sym 25, at 0x10e1bce0, mask 0x40 |
| 4 | invalid operation exception (software)...0 |
| 5 | L3 ecc control register: 00000000 |
| ... | ... |
---
## 3. Transformation Logic
A horizontal arrow points from the System Log to the Log Sequences, indicating a data flow. The following parameters define the transformation:
* **Mechanism:** Sliding window
* **Window size:** 2 (Each output sequence contains 2 log entries)
* **Step size:** 2 (The window moves forward by 2 entries for each new sequence, resulting in non-overlapping blocks in this specific example)
---
## 4. Output Data: Log Sequences
The output consists of multiple overlapping tables (Log Sequence #1, #2, #3, etc.). Based on the "Step size: 2", the entries are grouped as follows:
### Log Sequence #1
| Line # | Log Content |
| :--- | :--- |
| 1 | iar 00106ba8 dear 0246dd1c |
| 2 | 5052567 floating point alignment exceptions |
### Log Sequence #2
| Line # | Log Content |
| :--- | :--- |
| 1 | CE sym 25, at 0x10e1bce0, mask 0x40 |
| (2)* | *[Implicitly: invalid operation exception (software)...0]* |
*Note: The visual for Sequence #2 only explicitly shows the first line of its window (Source Line 3).*
### Log Sequence #3
| Line # | Log Content |
| :--- | :--- |
| 1 | L3 ecc control register: 00000000 |
*Note: The visual for Sequence #3 shows the first line of its window (Source Line 5). The stack continues upward as indicated by the vertical ellipsis (⋮).*
---
## 5. Summary of Flow and Trends
The diagram demonstrates a **fixed-window segmentation** of log data. Because the **Window size** and **Step size** are both equal to **2**, the system is performing a "tumbling window" or non-overlapping partition.
* **Sequence #1** captures Source Lines 1-2.
* **Sequence #2** captures Source Lines 3-4.
* **Sequence #3** captures Source Lines 5-6.
This process transforms a continuous stream of unstructured or semi-structured text into fixed-length packets suitable for machine learning input or batch analysis.
