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docs/search_syntax.md

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+# Search Syntax Documentation
+## Introduction
+This document serves as a guide to the search syntax that enables users to effectively filter metrics and runs. 
+
+The syntax follows Python conventions, in the sections that follow, we will delve into the specifics of the supported operations and provide examples.
+
+- [Search Runs](#search-runs)
+- [Search Metrics](#search-metrics)
+- [Operations](#operations)
+  - [String operations](#string-operations)
+  - [Numeric operations](#numeric-operations)
+  - [Boolean operations](#boolean-operations)
+    - [Implicit Boolean comparison](#implicit-boolean-comparison)
+  - [Logical operations](#logical-operations)
+  - [```in``` operator](#in-operator)
+- [Search run examples](#search-run-examples)
+  - [Example with ```run.name``` (string)](#example-with-runname-string)
+  - [Example with ```run.duration``` (numeric)](#example-with-runduration-numeric)
+  - [Example with ```run.archived``` (boolean)](#example-with-runarchived-boolean)
+  - [Run parameters](#run-parameters)
+  - [Filtering Runs with Unset Parameters](#filtering-runs-with-unset-parameters)
+  - [Filter Runs using Regular Expressions](#filter-runs-using-regular-expressions)
+  - [Complex query for run search](#complex-query-for-run-search)
+- [Search metrics examples](#search-metrics-examples)
+  - [Example with ```metric.name``` (string)](#example-with-metricname-string)
+  - [Example with ```metric.last``` (numeric)](#example-with-metriclast-numeric)
+  - [Filter Metrics by run](#filter-metrics-by-run)
+  - [Complex query for metric search](#complex-query-for-metric-search)
+
+
+## Search Runs
+You can filter the runs using the following attributes associated with the ```run``` object:
+| Property               | Description                                         | Type             |
+| ---------------------- | --------------------------------------------------- | ---------------- |
+| ```run.name```         | Run name                                            | ```string```     |
+| ```run.hash```         | Run hash                                            | ```string```     |
+| ```run.experiment```   | Experiment name                                     | ```string```     |
+| ```run.tags```         | List of run tags                                    | ```dictionary``` |
+| ```run.archived```     | True if run is archived, otherwise False            | ```boolean```    |
+| ```run.active```       | True if run is active(in progress), otherwise False | ```boolean```    |
+| ```run.duration```     | Run duration in seconds                             | ```numeric```    |
+| ```run.created_at```   | Run creation datetime                               | ```numeric```    |
+| ```run.finalized_at``` | Run end datetime                                    | ```numeric```    |
+| ```run.metrics```      | Set of run metrics                                  | ```dictionary``` |
+
+## Search Metrics
+You can filter the metrics using the following metric attributes associated with the ```metric``` object:
+| Property                | Type          |
+| ----------------------- | ------------- |
+| ```metric.name```       | ```string```  |
+| ```metric.last```       | ```numeric``` |
+| ```metric.last_step```  | ```numeric``` |
+| ```metric.first_step``` | ```numeric``` |
+
+## Operations
+
+### String operations
+For the ```string``` attributes you can use the following comparison operator:
+- ``` == ```
+- ``` != ```
+- ``` in ```
+- ``` .startswith() ```
+- ``` .endswith() ```
+- ``` re.match() ```
+- ``` re.search() ```
+
+### Numeric operations
+For the ```numeric``` attributes you can use the following comparison operator:
+- ``` == ```
+- ``` != ```
+- ``` > ```
+- ``` >= ```
+- ``` < ```
+- ``` <= ```
+
+### Boolean operations
+For the ```boolean``` attributes you can use the following comparison operator:
+- ``` == ```
+- ``` != ```
+
+#### Implicit Boolean comparison
+You can also use boolean attributes directly in a conditional statement without any comparison operator. 
+
+Equivalent to comparing the attribute to True.
+
+```python
+run.archived  # Checks if run.archived is equal to True
+```
+Equivalent to comparing the attribute to False.
+```python
+not run.archived  # Checks if run.archived is equal to False
+```
+### Logical operations
+You can create complex search queries combining multiple conditions with logical operators.
+- ``` and ```
+- ``` or ```
+- ``` not ```
+
+### ```in``` operator
+The ```in``` operator can also be used for checking whether a value is in a list
+
+```python
+run.experiment in ["my-first-experiment", "my-second-experiment"]
+```
+
+## Search run examples
+
+### Example with ```run.name``` (string)
+Select only the runs where the name exactly matches "TestRun1"
+
+```python
+run.name == "TestRun1"
+```
+
+Select only the runs where the name is different from "TestRun1"
+```python
+run.name != "TestRun1"
+```
+
+Select only the runs where "Run1" is contained in the run name
+```python
+"Run1" in run.name
+```
+
+Select only the runs where the name starts with "Test"
+```python
+run.name.startswith('Test')
+```
+
+Select only the runs where the name ends with "Run1"
+```python
+run.name.endswith('Run1')
+```
+
+### Example with ```run.duration``` (numeric)
+
+Select only the runs where the duration is exactly 3600 seconds (1 hour)
+
+```python
+run.duration == 3600
+```
+
+Select only the runs where the duration is greater or equal to 3600 seconds (1 hour)
+```python
+run.duration >= 3600
+```
+
+Select only the runs where the duration is less than 3600 seconds (1 hour)
+```python
+run.duration < 3600
+```
+
+### Example with ```run.archived``` (boolean)
+Select only the runs where the archived attribute is true
+```python
+run.archived
+```
+
+Select only the runs where the archived attribute is not true
+```python
+not run.archived
+```
+
+### Run parameters
+Run parameters can be accessed via attributes.
+![FastTrackML Run List, param filter](images/search_runs_param_filter.png)
+
+### Filtering Runs with Unset Parameters
+
+To filter runs based on whether a parameter is not set, you can use the following syntax:
+
+```python
+run.attribute is None
+```
+This expression will return runs for which the specified parameter is not defined.
+
+Showing all the runs
+![FastTrackML Run List](images/search_runs.png)
+
+Showing only the runs where param1 is not set
+![FastTrackML Run List of not set param](images/search_runs_none_param.png)
+
+### Filter Runs using Regular Expressions
+
+Match finds an exact match at the beginning of a string.
+![FastTrackML Run filter using regular expression match](images/search_runs_regular_expression_match.png)
+
+Search looks for a pattern anywhere in the string.
+![FastTrackML Run filter using regular expression match](images/search_runs_regular_expression_search.png)
+
+### Complex query for run search
+The query selects the runs that meet the following conditions:
+
+
+- ```run.archived``` can be either ```True``` or ```False```.
+- The duration of ```run``` must be greater than ```0```.
+- The ```run``` has to contain a metric named ```'TestMetric'``` and its last recorded value must be greater than ```2.5```.
+- The name of ```run``` should not end with ```'4'```.
+
+```python
+(run.archived == True or run.archived == False) and run.duration > 0 and run.metrics['TestMetric'].last > 2.5 and not run.name.endswith('4')
+```
+
+## Search metrics examples
+
+### Example with ```metric.name``` (string)
+Select only the metrics where the name exactly matches "TestMetric1"
+```python
+metric.name == "TestRun1"
+```
+
+Select only the metrics where the name starts with "Test"
+```python
+metric.name.startswith('Test')
+```
+
+Select only the metrics where the name contains "Metric1"
+```python
+re.search("Metric1", metric.name)
+```
+
+### Example with ```metric.last``` (numeric)
+
+Select only the metrics where the last value is exactly 1.1
+
+```python
+metric.last == 1.1
+```
+
+Select only the metrics where the duration is greater or equal to 1.1
+```python
+metric.last >= 1.1
+```
+
+Select only the metrics where the last value is less than 1.1
+```python
+metric.last < 1.1
+```
+
+### Filter Metrics by run
+You can also filter the metrics by combining  metric attributes with run attributes.
+
+Showing the metrics with the last value greater than 6 belonging to a run with the name that starts with marvelous.
+
+![FastTrackML Metric List filter by metric and run attributes](images/search_metrics_filter_by_run.png)
+
+### Complex query for metric search
+The query selects the metrics that meet the following conditions:
+
+- The ```metric.name``` field must be ```"TestMetric1"``` or ```"TestMetric2"```.
+- The``` metric.last_step``` field must be greater than or equal to ```1```.
+- The ```run.name``` field must either end with ```"2"``` or start with ```"TestRun1"```.
+- The ```metric.last``` field must be less than ```1.6```.
+- The ```run.duration``` must be greater than ```0```.
+
+```python
+((metric.name == "TestMetric1") or (metric.name == "TestMetric2")) and metric.last_step >= 1 and (run.name.endswith("2") or re.match("TestRun1", run.name)) and (metric.last < 1.6) and run.duration > 0
+```